Transmission database - for all your crank / bb / bottom bracket questions

Nice but pricey. The track version of the BB (BB-7710) uses cartridge bearings, the road version (BB-7700) uses needle/ball bearings that are notoriously bad in wet weather. The axle length / dimensions are the same though, either works with the track cranks.

The 7710 BB is sold as "unsealed" too though, despite the cartridge bearings, so it might be something to avoid for an all-weather bike. Though I bet it would still last longer than an Omnium GXP BB.

What is fucking me is the level hub I'm using which has a messed up 45mm chain line hence the requirement for an adjustable chainline.

I've just won a 7710 crank and BB but I stupidly didn't stop to ask if the bb chain line is adjustable at all. Can it be adjusted or am I looking at spacers?