| Material | Frame: 7020 T6 aircraft aluminum; Forks: 4130 CrMo; TIG welded |
|---|---|
| Weight | Frame: 1800-2100 g (depending on size); Forks: 1000 g |
| Headset | 1 1/8″ Ahead, external cup (SHIS EC 34/28.6 – EC 34/28.6) |
| Bottom bracket | BSA, 73 mm wide |
| Seatpost | Ø 31.6 mm |
| Seatpost clamp | Ø 35 mm |
| Front hub compatibility | 100 mm hub spacing, 9 mm axle, quick release |
| Rear hub compatibility | 135 mm hub spacing, 10 mm axle, quick release |
| Wheel size | Depending on frame size, see geometry table |
| Dropouts | Sliding, 15mm travel (derailleur hanger or disc-brake dropouts available) |
| Brake mounts | Optional IS2000 disc brake (see above) |
Some thoughts on wheel sizes:
- Does the wheel size define the handling of your bike? No. It’s the combination of rim and tyre size that counts. 26″ rims with 42 mm tyres will roughly add up to 643 mm wheel diameter (559+2×42), almost exactly the same as for 650b rims with 30 mm tyres (644 mm). Changing tyre size from 25 to 35 mm will increase the wheel diameter by 20 mm. Among other things, the wheel diameter defines trail and bottom bracket clearance, which heavily impact steering and riding behaviour of your bike. So if you just specify a wheel size for the frame, you’re leaving out a lot of important details. That’s why there are recommended rim/tyre combinations for these frames, making sure that the bike you build has the optimal riding properties.
- Assumption 1: There is an ideal weight distribution between front and rear wheel. Assumption 2: A comfortable riding position depends on your body height. Assumption 3: You don’t want toe-overlap.
Keeping the wheel base of your bike fixed at a certain value (ideal wheight distribution and riding position) while increasing the wheel diameter will inevitably lead to toe overlap at some point. If you want to avoid toe overlap, there is a maximum wheel diameter for a given frame length which you should not exceed. In other words: The shorter the frame, the less sense it makes to use 700c wheels, because there simply is not enough space. The longer a frame gets, the more space you will have for the wheels. While you don’t neccessarily have to increase wheel diameter with frame size, experience shows that bigger frames handle nicely with bigger wheels. That’s why the recommended wheel sizes for the V6 frames scale with the frame size.