First Look: The Mason Raw is a versatile steel RIB made in the UK


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You may never have heard of Mason before. This is a small British brand offering a range of road, gravel and adventure bikes, all with buckled handlebars. But now they’ve released their first flat-bar mountain bike, the Mason Raw.

This is a steel frame hardtail, made in the UK and designed for trail running, travel, biking … whatever you want, really. It has no less than fifteen bosses for mounting bottles, bags and other accessories, but it also has a 120mm fork and geometry that wouldn’t out of place on an aggressive hardtail. The spec is also highly customizable, so it looks like there are plenty of ways to use this bike.

Raw mason details
• Intended use: “Trail & Travel”
• Made in UK with Dedacciai / Reynolds steel tubing
• Fork travel: 120 mm
• Wheels: 29 in.
• Frame weight claimed: 2.4 – 2.67 kg
• Seat angle 75.1 °, head angle 66 ° (sagging)
• Sizes: S, M, L, XL
• Price: £ 1,695 (frame only) to £ 4,195 (XT Launch version)
• masoncycles.cc

The frame features a traditional non-drop top tube, designed to provide more room to store frame bags inside the spacious front triangle. The tubes are studded with bosses for bolting various kit pieces, including rack mounts and bosses under the down tube and on the top tube. You can even specify male (outer) bosses on the seat tube to allow you to operate a long dropper rod without regular bottle cage bolts limiting insertion depth. The point is, you can charge it with enough kit for a relatively comfortable ride lasting several days. Alternatively, you can just hang a water bottle on it and take a hot ride.


Geometry

Speaking of which, the geometry of the Raw looks a lot more fun than your typical bike hardtail. There is a head angle of 66 degrees (measured at sag) and an effective seat angle of 75.1 to 75.4 degrees (depending on size). Reach ranges from 426mm (S) to 491mm (XL), and the bike is equipped with either 35 or 45mm stems, which should help keep handling relatively confident on steep, technical terrain. Sure, there are looser hardtails these days, but Mason didn’t want too much wheel flop when the bike is loaded.


Manufacturing

The frame is made from a combination of Reynolds and Dedacciai Zero and Zero UNO tubes, all made in Europe. The tubes are then shaped and welded together by Five Land Bikes, based near Edinburgh, Scotland, and also working with Cotic and Swarf.


Frame characteristics

• Clearance for 29 x 2.6 in tires and 34 t bed
• CNC machined brake support and dropouts
• Head tube reinforced with rings made in the UK
• 73mm BSA stainless steel threaded bottom bracket shell
• Integrated and removable rack supports hidden in the legs
• Optional top tube pack brackets.
• Front triangle “open” to make room for a full size bag.
• Several cage bosses on top and under the down tube
• Optional male threaded bottle cage mounts to the seat tube to provide clearance for long dropper stems
• Internal routing of cables / pipes where it makes sense.
• 3D printed TPU, ‘MASON Element’ base protector.
• Set of high quality “black stainless steel” bolts and fittings.


Construction kits and prices
XT Launch bike build: £ 4,195

• Rockshox SID Ultimate fork
• Complete transmission XT M8100 (chainring / cassette size according to customer’s request)
• XT M8100 brakes
• Hunt Trailwide V2 29 “wheelset
• Renthal Fatbar
• Deda EC / ZS44mm sealed bearing headset
• Ergon GA2 locking on the handles
• Ritchey WCS trail stem (length on request)
• Fizik Terra Argo X3 Kium rail saddle
• Xfusion Manic 31.6 dropper rod (length according to customer’s request)
• Choice of Maxxis or Vittoria 29 “tires

SLX Bike Build: £ 3,795

• Rockshox SID Ultimate fork
• Complete SLX M7100 transmission (chainring / cassette size according to customer request)
• SLX M7100 brakes
• Hunt Trailwide V2 29 “wheelset
• Pro Koryak handlebars
• Deda EC / ZS44mm sealed bearing headset
• Ergon GA2 locking handles
• Pro Koryak stem (Length according to customer request)
• Fizik Terra Argo X5 saddle
• Xfusion Manic 31.6 dropper rod (length according to customer’s request)
• WTB ranger 29×2.4 ”tires.

RAW frame with Rockshox SID Ultimate 2 fork € 395

• Includes DedaElementi helmet, MASON Macro clamp, MASON SwitchLever thru-axle, full black stainless steel bolt set, all
MultiPort fittings and inserts, MASON Element base protector.
• Prepared, faced and chiseled, ready to build.
• Price includes 15 holders for bottles / bags / accessories, all internal routing and options for male thread or eyelet
cage brackets / accessories on the seat tube and with / without top tube pack brackets.

RAW frame only £ 1,695

• Includes all of the above parts and accessories without the fork.


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