I get a lot of questions about the geometry on the Roamer so here is the build and numbers.
My idea about this frame was to get a bit more fun and aggressive fat bike. It´s basically an all mountain hardtail with 4.6″ tires. Ready to fit a 120 mm suspension fork up front for summer and rigid steel fork with anyting-cage mounts for winter bikepacking.
BTR makes the best hardtails in the world so they were the obvious choice for this bike.
I gave Tam my requests and he did the design with a little input from me regarding the fat bike specifics.
Since i ride it like a mountain bike in the summer i went for 100 mm bottombracket and 177 mm rear spacing. It fit 4.6″ tires (maybe 4.8″) on 80 mm rims. I´ve been running Dunder/Flowbeist from 45nrth and never felt i needed wider. And i ride snow for 7 months a year and plenty of beaches in the summer. Also 177 rear and 100 bb make it more like a regular mountainbike.
Stack (B): 671.7mm
Seat Tube Length (C): 420mm
Effective Top Tube (D): 639.7mm
Bottom Bracket Drop (E): 70.3mm
Effective Chain Stay Length (F): 435mm
Wheelbase (G): 1195.7mm
Head Angle (H): 67deg
Effective Seat Angle (I): 74.2deg
Actual Seat Angle (J): 73deg
Head Tube Length (K): 130mm
Headset Lower Cup Stack (L): 14mm
Fork Axle-Crown (M) (Bluto): 531mm
Fork Offset (N): 51mm
The frame is hand built with Reynols 631 tubing the frame and 853 in the fork.
All housing is internal including dropper post.
Breaks – Shimano XT with 203 mm front and rear discs
Drivetrain – 1×11 speed Shimano XT 11/40 but swapping to 11/42 or /46
Crankset – Raceface Aeffect with 28t chainring
Pedals – Shimano Saint
Bottombracket – Hope
Head set – Hope
Stem – Thomson X4, 40 mm
Bars – Custom Oddmoné Titanium from Oddity Cycles 800 mm, 25 mm rise 15 degeers backsweep
Seatpost – Crankbrothers Highline dropper. Diameter 31.6, internal hosing.
Grips – Lizardskin
Wheels – DT Swiss BR710 on Hope Fatsno Hubs. 177 mm rear and 150 mm front
Tires, Summer – 4.4″ Jumbo Jims
Tires, Winter – 4.6″ 45nrth Dunder/Flowbeist