Thinking

The ‘Winter Bike’. This used to be a heavy, dull, uninspiring hack that would take ‘guards and get you through the winter until you could spring back onto your ‘best bike’. The idea was it would make your race bike feel even quicker than you remembered. My thinking was, make your off-season bike fit properly and feel just as engaging to ride as the best bike, out of this thinking the ‘4Season’ bike was born. This is not a lifeless ‘do it all’ machine but a spirited ‘multi-discipline’ bicycle, designed to work in many ways and maybe replace 3 or 4 of your fleet!

Discs make huge sense for a bike of this type and the first lesson I learned when using them was that it's really not about all-out stopping power. One of the greatest benefits is control. Disc brakes have huge benefits for a sporty 4Season bike, which is one of the reasons I started with these two models. They work consistently in all conditions, they definitely pull up quicker in the wet, they don't grind your expensive rims into black sludge and in my experience they change the whole riding experience for the better, especially when coupled with modern disc-specific wheels and 28mm tyres. You’ll find yourself riding in a more confident, controlled, fluid and ultimately more efficient way.

ALL the mounting eyelets

All eyelets are discretely hidden on the inside of stays where practical. This keeps things looking clean and business-like when the ‘guards are off.  The rear eyelets are placed away from the dropouts inside the seat stays so there is no interference with the disc-calliper. Proper, separate eyelets for rack mean no 'doubling up' onto the mudguard mounts when fitting a rack.

The InSearchOf frame has a full compliment of brazed [not riveted] mounting eyelets for rack mounting, fluid carrying and Anything Cage attachment. Added to the mounting points on the fork and coupled with frame and bar bags, this gives the InSearchOf huge versatility and carrying capacity for sustained adventure. Even the smallest 42cm frame size has a full compliment of carrying points [unlike many other brands]. We use 4 eyelets on the top of the down tube so you can move the cage up and for a 2nd cage to the seat tube, or move it down for max bag space or just fit a seat tube cage and run a full bag at the front! There is also an Anything Cage mount under the DT and two on the fork legs. Full ‘gaurd and dedicated heavy duty rack mounts too.

Chain Keeper

Often forgotten about on modern frames, the ‘Chain Keeper’ provides a handy place to hook the chain when the rear wheel is out. The chain is kept under tension so it doesn’t hop off the front rings and it’s quick and easy to drop the back wheel in.

Disc-Mounts

We use ‘flat-mount’ for the front and rear callipers, it is stable and accurate and allows easy positioning and adjustment of the brake parts. The calliper is mounted on the chain stay, this allows us to use lighter more comfortable seat-stays and gives a flex free mounting for the flat-mount components to be welded to. Mounting the brake on the chain stay also keeps it cleanly out of the way of rack and ‘guard stays. Smiles all round.

The steel frame uses a specially modified post-mount component from the master-engineers Bear Frame Suppies in the UK.

Dropouts

Again machined in the UK. We worked with BEAR to develop these dropouts specifically for the ISO. Super accurate and tough with brazed [not bolted] caliper mount, they are assymetric to keep them as short as possible to save weight and allow max heel clearance. The machined Alu. hanger fits inside the dropout and a high quality stainless threaded part is fitted to the outside to take the thru-axle. This way the materials are optimised and rear-mech forces & wheel/axle forces are isolated from each other. The parts are also individually replaceable.

The finish

We searched out the best and most highly recommended decal makers and paint finishers. Absolutely no expense is spared on finishing. The paint finishes are deep and lustrous, with a thick coat of colour and two coats of lacquer. The frames are treated with anti-corrosion coatings inside and out before paint. It's more expensive to do it this way, but the finish is super durable and will stay that way for a long time.

The Head Badge

Our 'Mason Crown' sits proudly on all our head-tubes. We went through many variants before coming up with this one, it's solid copper, high polished and finished with Pearl Black anodising. Expensive, but worth it.

The geometry of the Resolution and Definition frames is designed for distance and to deliver a spirited and lively ride and encourage out of the saddle attacking climbs and fast, secure descents. These are not race-bikes but they are designed to be ridden fast. 

The longer wheelbases allow larger clearances for higher volume tyres and full ‘guards, slacker head angles give stability and mean you can run a slightly shorter stem length than normal without upsetting the handling. Low BB’s feel great through the curves and help compensate for larger tyres. The head tubes are longer for comfort over distance, without being too long so that acceleration and climbing efficiency are compromised, we think we’ve found the sweet-spot.

Tubing material, shape and dimensions have a huge influence on the way the finished bike will ride, because of this it is of prime importance that time is spent choosing the tube set that will perform best for the intended uses of the bicycle. At Mason, we don’t use ‘off the shelf’ tube sets, we take time to choose each tube individually, considering the influence that it will have on ride quality and overall performance. We will use a blend of tubing types, custom shapes and bends to help us achieve this goal.

Steel

Why steel? After working with many frame building materials over the years, I became really interested in developing a performance steel frame when Columbus introduced their beautiful ’Spirit’ and ‘Life’ tube sets. Combining these tubes with modern componentry and progressive geometry was the formula for something very special.

Steel has legendary qualities for performance bike frames, its elastic properties lend life and feel to the ride and its excellent fatigue properties mean that with proper corrosion protection the frame will last a very long time. 

The Columbus ’Niobium Doped’ alloy that is used to produce the Spirit and Life tubing really makes this an exciting material to use for a lightweight, performance bike. Their fine grained, micro-alloyed steel allows wall dimensions as low as 0.4mm, giving really low weights along with high fatigue resistance and excellent welding qualities. 

We chose a special blend of Spirit and Life tubing for the construction of the Resolution frame. 

Our tube choice

Top Tube

The Top Tube has a very important part to play and the ovalised and facetted Spirit top-tube works beautifully in its role. The wide profile gives great lateral stability, especially when stomping hills out of the saddle and it mates perfectly with the large head tube giving increased weld area for strength and durability. 

Down Tube

This is one lovely tube. The large diameter ‘D-Section’ allows wall thickness to be reduced without loss of overall strength, torsional stability and ride quality. The raw, unmitred tube weighs just 365g. The oversize tube also gives a greatly increased weld area at the base of the taper head tube and at the bottom-bracket shell. The flat top to the tube provides a wide weld along the top of the BB shell and avoids excessive overlap onto the seat tube, an area which can be prone to fatigue cracking. The round profile along the base of the tube wraps under the BB and adds stability. 

Ultimately, this tube helps to provide a spirited and lively ride feel with instant steering response, and minimum flex at the BB means maximum power output at the wheel.

Head Tube

Our frames use modern 1-1/8” - 1.5” taper head tubes, the bearing seats are durable, high-grade stainless steel. Pioneered by composite frames, the taper head tube makes huge sense for metal frames too; 

  • The large overall diameter provides a useful weld area, really aiding strength and lateral stability, this is particularly important at the base where it meets the down tube. 
  • The fully integrated headset is light and has a very low stack-height, so you can slam the stem for when you are trying hard on the local power-hour! I have used this headset design in all my frames for many years with extremely good results.
  • The large 1.5” lower bearing, mated to a tapered carbon fork steerer gives flex-free braking and instant response to steering input.
  • It makes a beautiful place to mount our very special Mason head tube badge.

Seat Tube

Seat tube diameters have expanded over the years, this is good news for keeping the BB shell stable but not so good for comfort on long rides due to the oversize, stiff seat post that slides into it. Our tube is the best of both worlds, a 31.8mm OD provides the weld area and stops the BB from rocking under power, the seat post size is 27.2mm helping to dial out road-buzz when used with a quality carbon post like our Mason Penta micro-adjust. Once again, your input is translated into maximum output and the smooth ride means you stay fresher for longer. More miles!

Seat Stays

We tried many shapes before settling on this one, the wall thickness tapers from top to base and the perfect hourglass profile gives a sublime, smooth ride with the added spring of steel keeping things lively. We add a custom bend at the base to work with the disc-rotor and calliper.

Chain Stays

Deep section for efficient power transfer, tapered and curved for ride-quality and to provide clearance for full ‘guards and larger tyres. Once again we add a custom bend so they work perfectly with the disc rotor and calliper.


InSearchOf

Almost the entire tubeset was developed in conjunction with Italian tube gurus Dedacciai, using their new 'ZERO', fine grain, micro-alloyed, progressive butted steel tubing. We work very closely with them to develop our Alu, Ti and steel tubesets for Bokeh, BokehTi, Definition and now the new ISO model [Resolution is developed with Columbus]. For the ISO every tube has a custom profile, section or bend to work exactly how we want it for ride quality, clearance and durability.


Head Tube

1.5 - 1/8" taper for large lower bearing to give durability and stiff responsive steerer for new HotShoe fork.


Top Tube

Dedacciai, ovalised horizontally for lateral stiffness and 'bowed' to our spec for extra space within the frame and ride quality enhancement.


Seatstays

These are a work of art and helped to inspire the development of the new frame! Flared outwards from the top for huge tyre clearance and then beautifully tapered down to Ø12mm at the dropouts and flared and flattened horizontally where they meet the seat tube. This makes the frame very responsive and laterally stable, whilst giving spring and compliance at the rear. The signature Mason 'BoatTail' kickdown at the base of the stays, really increases ultra-distance comfort and reduces surface vibration, it also gives huge clearance for brake caliper and large rotor and provides a superb vantage point for the discrete fender or rack mounts. There are also heavy duty rack-mounts at the base near the dropout.


Chainstays 

Widely spaced on the 73mm stainless BB and curved, crimped and ovalised for max chainring and tyre clearance [to work with max 36t ring and 2.8 x 27.5 tyre]. They are deeply ovalised for optimum power transfer and taper to Ø16mm at the rear where they meet the asymmetric CNC dropouts.


BB

73mm, BSA threaded, stainless steel shell. The best.


Down Tube

Once again, exclusive to Mason and made for us by Dedacciai in Italy. Ø38mm where it meets the HT for large weld area, then curved for suspension fork clearance and with our exclusive 'DForm' section where it meets the BB. This gives a flat wide weld for maximum stability at the pedalling platform and avoids excessive tube overlap onto the seat tube which can lead to fatigue.


Seat Tube

This one is from the UK! A super high quality Reynolds 853 butted tube, oversize Ø34.9mm for 'Core Stability' and Ø31.6 internally to be compatible with all popular dropper posts and our own Penta carbon seatposts. Exclusive Mason Macro Ø34.1mm seatclamp tops it off. Seat tube also has internal routing for stealth dropper.

Aluminium

Why Alu? I became fascinated with pushing the boundaries of aluminium for frame construction during my time designing for Kinesis UK. By using clever tube manipulation, advanced tubing and sensible design, a modern aluminium frame can rival composite on weight and ride feedback and quality. Modern aluminium frames draw on many of the design influences learnt from composite frames, such as oversized BB’s, taper head tubes and switchable internal routing. Teamed with a properly designed carbon-monocoque fork, the contemporary Aluminium frame is a formidable piece of kit. 

Aluminium also has the advantage of being relatively economical to produce and easier to manipulate and form than other materials like steel and Ti. This means that the finished product, although still high performance, does not have to be high price. In my opinion it makes way more sense to own a highly developed Alu frame, rather than a cloned composite frame of the same price.

Top Tube

Like the top tube on it’s steel cousin, the top tube used for the Definition has a pronounced ovalised section. The wide profile gives great lateral stability, especially when stomping hills out of the saddle and it mates perfectly with the large head tube giving increased weld area for strength and durability. The tube flows beautifully into the seat stays as it passes the seat tube, not only pleasing to the eye but excellent structurally at this crucial area.

Down Tube

A full 48mmØ allows wall thickness to be pared down without loss of overall strength, torsional stability and ride quality. The oversize tube also gives a greatly increased weld area at the base of the taper head tube and at the bottom-bracket shell, and allows us to pass the control cables, hose and wires cleanly through.

Head Tube

Our frames use modern 1-1/8” - 1.5” taper head tubes, the bearing seats are accurately machined and re-finished after welding. Pioneered by composite frames, the taper head tube makes huge sense for metal frames too; 

  • The large overall diameter provides a useful weld area, really aiding strength and lateral stability, this is particularly important at the base where it meets the down tube. 
  • The fully integrated headset is light and has a very low stack-height, so you can slam the stem for when you are trying hard on the local power-hour! I have used this headset design in all my frames for many years with extremely good results.
  • The large 1.5” lower bearing, mated to a tapered carbon fork steerer gives flex-free braking and instant response to steering input.
  • It makes a beautiful place to mount our very special Mason head tube badge.

Seat Tube

Seat tube diameters have expanded over the years, this is good news for keeping the BB shell stable but not so good for comfort on long rides due to the oversize, stiff seat post that slides into it. Our tube is the best of both worlds, a 31.8mm OD provides the weld area and stops the BB from rocking under power, the seat post size is 27.2mm helping to dial out road-buzz when used with a quality carbon post like our Mason Penta micro-adjust. Once again, your input is translated into maximum output and the smooth ride means you stay fresher for longer. More miles!

Seat Stays

Flowing out of the ovalised top tube then curving and tapering down to the axle, the clever tube design has a custom bend giving disc-rotor and calliper clearance and allow a little compliance to tune out road-buzz.

Chain Stays

Deep section for efficient power transfer, where they meet our custom-machined BB shell, tapered and curved for ride-quality and to provide clearance for full ‘guards and larger tyres. Once again we add a custom bend so they work perfectly with the disc rotor and calliper.

The stays come together at our custom dropout design to form the highly functional and elegant ‘Boat-Tail’ design of the Definition frame.

Curved seat stay bridge

The elegant curve of the bridge gently cradles your mudguard and the eyelet at its base allows a single bolt to keep it secure and rattle-free. Bin your flimsy, bent metal mudguard clips forever!

BB Shell

The Definition frame uses a specially designed, ‘custom-machined just for us’ BB shell. The large 50mmØ presents a large weld area to the base of the down tube and then steps down to the 68mm width threaded seats. This step-down provides plenty of space around the outside of the bottom-bracket bearings to allow the control cable and hose to pass through on the way to the chain stays and out to the brake and rear mech.

NOTE: This BB shell design requires the use of a bottom bracket with a 'sleeved' axle. Please contact us if you would like advice.

BB’s

The bicycle bottom bracket is an important area, it needs to channel your pedalling effort efficiently into forward motion. Because of its crucial task, the BB has undergone intense design scrutiny in recent years in order to wring every last watt of performance out of this highly stressed area. Out of this research have sprung numerous ‘standards’, many of them more suited to composite frames than welded metal frames. We choose a more traditional 68mm, BSA, threaded standard for our 4Season frames because we believe it gives greater durability and creak-free reliability over many miles. The threaded BB is easier to service using standard tools and you are more likely to find a replacement when adventuring far from home. A properly lubricated, threaded BB is also an ideal interface with a metal BB shell.

Why internal? Internal routing has become very popular recently, especially on carbon road bikes but now increasingly on Alu and steel road bikes and MTB's. Mason will never do anything just because of a trend or fashion, every feature must make sense from a performance point of view to justify inclusion on one of our frames or bikes. 

The cables, hoses and electronic shift control wires run through the frame tubes, guided by our Mason 'MultiPort' adaptable inserts. Interchangeable Internal routing keeps the control cabling away from road dirt and grime, helps avoid accidental damage, makes cleaning easy, de-clutters your bike and means you can adapt your bike easily to work with various shifting and braking methods.

Multiport

Unique to MASON. We wanted our frames to be easily adaptable to take a variety of shifting and control systems, running the cables and electronics internally. No system had yet been developed to bring this technology to performance steel frames, so we developed our own! 

Our frames use an adaptable, internal cable routing system. Developed by us to allow your Mason frame to be used with a combination of control systems and adapt and evolve with your requirements and riding styles. We are the first to bring this type of system to a performance steel frame.

Interchangeable alloy parts allow five options:

  1. Full cable outer.
  2. Hydraulic Hose.
  3. Split outer.
  4. Electronic cable [e.g. Shimano Di2].
  5. Blank.

3D Printed BB cable stop

Smooth, efficient cable and hose routing is essential for accurate, light and durable shifting and braking. We worked very hard to make sure all cable routes are as smooth and direct as possible to minimise drag and increase life and efficiency. The structural Nylon, 3D printed and polished, BB mounted cable stop is unique to Mason, it allows the optimum cable route to the front mech. is very strong and low-friction and can be removed completely if you are running Electronic Shifting.

NoSump

We worked very hard to make sure there are no 'sumps' in the cable runs to prevent moisture collection and shift deterioration. Another small but very important detail that many other makers get wrong. 

Shimano & SRAM Drivetrain and braking

The stop and go hardware had to be the most efficient and durable, be perfectly compatible and mean business, so Shimano & SRAM were the only choices here.

Deda stem, bars and headset

We love the shape, comfort and function of the Deda component range and they compliment the Italian built frames beautifully.

Fabric saddle and tape

We searched long and hard for saddles and tape that offered the function and form to match our bikes. As soon as I saw the UK designed, understated, high-tech functionality of the Fabric components the decision was made.

Hunt Wheels

We needed the perfect wheelset for our first bikes, so we worked with HUNT Bike Wheels to design our own.

Mason Clamp and Post

Lightweight, simplicity, durability and style were required here, so we specified our own.

I spent a long time looking for the perfect fork to work with the frame designs that I had in my head. It wasn’t out there. The fork is such a crucial component to the performance of the bicycle that I often start there and ‘work back’ when designing a new frame set and bike. It is far better to design the frame and fork in conjunction with each other, rather than accepting the compromises of a product designed by another company without your end use in mind. Existing forks were either Cyclocross crown-height and overbuilt with huge clearance or road race crown-height with no ‘guard clearance and a harsh ride. I made the decision that I would have to tool for my own fork, not cheap or easy, but the best way forward.

Our ‘Aperture’ fork is full carbon monocoque, 420g, flat-mount disc, it has 160mm rotor compatibility, is internally routed and has proper clearance for a full size mudguard and 32mm tyres. Eyelets are on the inside of the blades and angled correctly to prevent the stays from twisting. We provide adapters to run the stays behind the fork blades if your 'guards use very large plastic end parts. 

The upper eyelet is out of the way at the rear of the crown and can be plugged when not in use. It would be hard to tell that this is a dual-use fork when the ‘guards are off.

The steerer is our own ‘TrueTaper’ design, not merely stepped out for a larger bearing at the base. The ‘ThruAxle12’ dropouts feature our unique Mason 'F-Stop' axle system, with Mason developed axle and replaceable fork inserts. The 'F-Stop' system uses replaceable inserts that can be swapped out if the threads are stripped or worn. There is not one hint of brake-rub when out of the saddle and attacking steep climbs and there is little unwanted flex under braking.

Because we own the tooling we could work with the maker to fine-tune the layup, ensuring an ideal compromise of stiffness, reaction to steering input and comfort for long rides.

The finished product has a muscular, flowing form dictated by its function, following our ‘Ride Driven Design’ ethos.

I visited many frame builders and spoke first hand with the frame makers before finally settling on two small companies in the Venice area of Italy, one for steel and one for Alu. They are both specialists in their particular materials and as passionate about detailing and finish as I am. Both makers have many, many years of experience and are enthusiastic to progress their craft, try new ideas and innovate.

Riding will always remain at the core of what we do, testing a frame on a machine tells you nothing about its spirit and quality of ride. Many riders of all abilities and from different disciplines ride and feedback on our sample frames before they reach production. We ride each frame ourselves and listen to the thoughts of each rider who has used our prototypes. Frame geometry and tubing type, shape and internal dimensions may alter many times before that perfect ‘final formula’ is found.

MASON isn't another faceless bike company, a bike company that our customers have no connection to. We deliver a bespoke and personal level of service from your very first email to us and throughout your MASON ownership. You'll always receive the same dedication to customer service wherever you are in the world.

We're amazed at the stories that bring people to MASON, and what makes the process special for us is to hear the stories of where MASON takes each customer in the future.


WE WILL LOOK AFTER YOU from your first email, phone call or contact at a show or ride.

... We will help with you during the decision making, fitting and buying process.

... We will advise you through delivery, set up and that first ride.

…We will look after you during the entire ownership of your Mason Cycles bicycle or product.

Our commitment to you doesn’t end as soon as the sale is made and we are HERE to contact for help, advice and of course to hear about your rides and adventures on our award winning bikes!