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BB size for a Giant TCR?(3 posts)

BB size for a Giant TCR?Xoc
May 2, 2003 8:47 PM
Hey all,

Can any one tell me what size bottom bracket I need? I have a 1999 Giant TCR-1r, with a Shimano 600 double crank on it. The BB that I have has developed some play, and I need to replace it. I can't find any details as to what size it needs.
re: BB size for a Giant TCR?Rusty Coggs
May 3, 2003 4:49 AM
English thread.The 9 speed ultegra doubles #65xx series use a 109.5 splined spindle. The 8 speed 600/ultegra doubles #64xx series used a 115mm tapered spindle. Since there was no 600 8 speed in 1999 I have no clue what you have on it. Model # should be on the back of the crank arm.
re: BB size for a Giant TCR?Xoc
May 3, 2003 10:59 AM
Sorry..I should have's a 99 frameset built with an 8 speed 600 group.

I took the old BB into the shop with me...68 x 115 was it. Thanks for the help.