Schwinn Homegrown Model Identifier › Forums › General Stuff › Homegrown Talk › BCD on chainring for 99′ XTR crank This topic has 1 reply, 2 voices, and was last updated 5 years, 8 months ago by tomatoadmin. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts August 2, 2018 at 4:12 pm #1609 JohnnyQPublicParticipant I’d like to turn my Homegrown into a 1×9 setup, but am unsure about the bolt circle diameter for chain ring…is it 104mm or 112mm? Anyone? August 25, 2018 at 2:29 pm #5187 tomatoadminKeymaster Should be 112 if it’s M950. https://www.sheldonbrown.com/cribsheet-bcd.html Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In