Pro gearing question

[High Velocity]

Will a 45T bottom gear fit in the stock Pro chaincase ? If so, does anyone know the chain pitch I'll need to go 20/45. Thanks

 

[B00nd0ck3r4lif]

Yes a 45 will fit, theres no way a 46 will fit though. In order for me to fit 19/45 i went to a 76 pitch chain and it had a fair amount of play i had to take up with the adjuster. 20/45 would have even less slack to take up so 76 would be a good fit.

 

[High Velocity]

I finally tried to install the 20/45 gearing and 76 pitch chain y/day. 76 P is too long for that combo. Will have to get a 74 P chain.