Carbonda CFR-707

The frame officially clears 700x50mm tires, but actual clearance depends on tire and rim width. Users have successfully mounted 700x50mm (measuring up to 52mm) with 5-6mm clearance on each side. Some have tried 2.2" mountain bike tires: front fits with minimal clearance, but rear does not (rubs chainstays). 650b x 2.1" generally fits, but wider may be tight. Always check with your specific tire and rim combination.

The frame uses a standard BSA threaded 68mm bottom bracket, so many options are available. For SRAM DUB cranks, you can use either DUB Road or DUB Wide; DUB Wide provides more tire clearance. For Shimano, a standard BSA 68mm bottom bracket (e.g., Shimano Ultegra SM-BBR60) works. If using SRAM AXS, DUB Wide is recommended for wider tires.

Frame weight for size S with paint and hardware is around 1,274g; size XL bare frame is 1,247g, with total frameset (frame, fork, hardware) around 2,126g. Complete bike weights vary: a typical build with GRX and 700x50 tires is about 10.5kg (23.1 lb), while lighter builds with carbon wheels and 1x drivetrain can be under 9kg (e.g., 8.6kg with Light Bicycle wheels).

The seatpost diameter is 30.9mm. The integrated seatpost clamp bolt should be torqued to about 5Nm, and carbon paste is recommended on the seatpost and clamp interface to prevent slippage. Some users have gone up to 8Nm on the seatpost head bolts with Loctite.

The frame can be ordered with either fully internal routing (through the headset) or external routing (ports on the headtube/downtube). Internal routing is clean but can be challenging for mechanical drivetrains due to tight bends, potentially causing poor shifting. Many users recommend full-length cable housing and foam or zip ties to reduce rattling. For 2x mechanical, some have experienced friction; electronic shifting (AXS/Di2) is easier.

The frame uses IS52/28.6 top and IS52/40 bottom headset bearings (ACR compatible). Carbonda supplies a headset, but some users upgrade to FSA ACR, Ritchey, or Hope. A common issue is insufficient compression or gap between the compression ring and steerer, which can be solved with thin metal spacers or different bearing widths (e.g., 7mm instead of 8mm).

The frame is designed for flat-mount brakes with 160mm rotors native. The fork can accept 140mm or 160mm rotors with the appropriate adapter. Using post-mount calipers may require an adapter, but clearance can be tight due to dropped seatstays; flat-mount calipers are recommended.

Yes, the frame has internal routing for a dropper post (30.9mm diameter). However, the 30.9mm size limits options compared to 27.2mm, and some users note that the seat tube angle and post diameter may affect comfort. A dropper can be installed with full internal routing.

As of 2024, the frameset (frame, fork, seatpost, clamp) is around $495–$650 USD, plus shipping (~$160–$190) and optional paint ($95–$200). Ordering is done via email with Carbonda (e.g., sales1@carbonda.com or specific contacts like Wing, Adam, Katie). Payment is typically via PayPal or wire transfer. Prices may vary, so request a quote.

Yes, the frame has mounts for full-length mudguards/fenders and a removable chainstay bridge fender mount. There are also mounts for bottles, bento box, and rear rack (via seatstay mounts). Some users note that the fender mount bolt at the chainstay/BB junction may interfere with wheel removal; a flat head bolt can help.

The CFR-707 has a long front center, high stack, and slack head angle (70.5°), similar to the Canyon Grizl and Devinci Hatchet. It is designed for stability on rough terrain, with a longer reach that can be compensated with a shorter stem. It is not a short wheelbase, low stack frame like the CFR505. Compare with your current bike using Geometry Geeks.

Newer versions of the CFR-707 are UDH compatible. If you plan to use a SRAM Transmission derailleur, UDH is required. For standard derailleurs, UDH works fine with a hanger. Check with Carbonda when ordering.

For 1x setups, users have successfully run 44T and 46T chainrings. The frame can accommodate larger chainrings, but clearance depends on the crank and chainline. For SRAM Wide cranks, up to 46T is common. For 2x, the frame supports standard gravel gearing like 46/30 or 48/31.

Toe overlap is generally less of an issue than on the CFR696 due to the longer front center. Users with size 46-48 shoes report little to no overlap on larger sizes (L, XL), but smaller sizes may have some overlap. The 707's front center is about 25mm longer than the 696 in comparable sizes, improving clearance.

The frame uses 12mm thru-axles: rear is 173mm length, M12xP1.5, 15mm thread; front is 120mm length, M12xP1.5, 14mm thread. Carbonda supplies axles, but aftermarket options are available. Some users note that the rear axle contact area can crack paint; adding a countersink or protective washer may help.

Yes, you can use a standard stem and handlebar with the semi-internal routing option (cables enter the headset via a special top cap and then route internally). This requires a compatible headset (e.g., FSA ACR) and a stem that allows cable passage (e.g., FSA SMR, Deda Superbox). Fully integrated one-piece cockpits are also available.