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.
Effective top tube – 634 mm
Seat tube length – 420 mm (31.6 diameter)
Head tube angle – 67 degrees
Seat tube angel – 73 degrees
BB drop – 70.25 mm
Chain stay length – 435 mm
Head tube length – 130 mm (44 mm diameter fits all forks)
Fork length – 511 mm (ready for 120 mm suspension fork)
Fork offset – 51 mm
Wheelbase – 1 187.87 mm
Stack – 646 mm
Reach – 450 mm
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 Titanum 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