![]() |
|
General Fat Chance Discussion Anything and everything about the best mountain bikes ever made. |
![]() |
|
Thread Tools | Search this Thread | Display Modes |
![]() |
#1 |
Member
Join Date: June 13th, 2011
Location: Macclesfield
Posts: 58
|
![]()
Can anyone tell me what length of bottom bracket I need for a 1991 Yo Eddy with a press fit bottom bracket and a Topline chainset? At the moment its got a 122.5mm axle and I am sure its not long enough.
Last edited by Rick Draper; October 24th, 2012 at 8:24 AM. |
![]() |
![]() |
![]() |
#2 |
Senior Member
Join Date: June 1st, 2006
Location: rio de janeiro
Posts: 1,043
|
![]()
If no one comes up w/ more experience.. 107mm.
__________________
wanted: ride time. |
![]() |
![]() |
![]() |
#3 |
Senior Member
Join Date: March 15th, 2010
Location: Naperville IL
Posts: 716
|
![]()
believe it or not I think the 120ish area is right
|
![]() |
![]() |
![]() |
#4 |
Senior Member
Join Date: February 12th, 2010
Location: laconia
Posts: 303
|
![]()
For the m 900 xtr crank 107/113 should be right in the ball park. Although Im not sure you will find one in those lengths if your 91 Yo has a press fit BB ? Good luck !
|
![]() |
![]() |
![]() |
#5 |
Global Moderator
Join Date: March 12th, 2009
Location: Tucson
Posts: 809
|
![]()
The 120-122 side of things is good for XT m730 series and that era XC Pro, but I'll chime with the others that XTR should need 107-113mm.
__________________
1975 Witcomb USA, 1981 Chris Chance; 1984 Fat Chance, 1987 Team Comp, 1991 Yo Eddy, Monster Fat, and Wicked ....happy to have finally found a clean 80s Fat Team Comp with a box crown fork ![]() |
![]() |
![]() |
![]() |
#6 |
Member
Join Date: June 13th, 2011
Location: Macclesfield
Posts: 58
|
![]()
Thanks for the answers. I found the advised BB lengths on mombat. Sadly I need a 107mm axle and with the collars thats just not workable.
Hence I have decided to try to find some Toplines or some Cook Bros RSR's. Shame really as the XTR's I have are really nice, O well. |
![]() |
![]() |
![]() |
#7 |
Member
Join Date: June 13th, 2011
Location: Macclesfield
Posts: 58
|
![]()
Right got some Toplines now, what length of BB axle do I need?
|
![]() |
![]() |
![]() |
#8 |
Senior Member
Join Date: February 12th, 2010
Location: laconia
Posts: 303
|
![]()
120/122 will work just fine..
|
![]() |
![]() |
![]() |
#9 |
Member
Join Date: June 13th, 2011
Location: Macclesfield
Posts: 58
|
![]()
Definitely needs a 127.5mm. Can anyone help me?
|
![]() |
![]() |
![]() |
#10 |
Global Moderator
Join Date: March 12th, 2009
Location: Tucson
Posts: 809
|
![]()
The arms are hitting the stays?
__________________
1975 Witcomb USA, 1981 Chris Chance; 1984 Fat Chance, 1987 Team Comp, 1991 Yo Eddy, Monster Fat, and Wicked ....happy to have finally found a clean 80s Fat Team Comp with a box crown fork ![]() |
![]() |
![]() |
![]() |
#11 |
Member
Join Date: June 13th, 2011
Location: Macclesfield
Posts: 58
|
![]() |
![]() |
![]() |
![]() |
#12 |
Senior Member
Join Date: February 12th, 2010
Location: laconia
Posts: 303
|
![]()
Wow.Real quick question. hows the fit of the crank taper on the crank ? 127.5 seems crazy long.
|
![]() |
![]() |
![]() |
#13 |
Member
Join Date: June 13th, 2011
Location: Macclesfield
Posts: 58
|
![]() |
![]() |
![]() |
![]() |
#14 |
Senior Member
Join Date: March 15th, 2010
Location: Naperville IL
Posts: 716
|
![]()
BOTH arms are hitting the stays? that seems really long? are sure its properly centered? you should have about 4mm clearance both sides from my experience
|
![]() |
![]() |
![]() |
#15 |
Member
Join Date: June 13th, 2011
Location: Macclesfield
Posts: 58
|
![]()
Sorry for the rubbish pics but I could not be bothered removing it from the stand. As you can see I was wrong they dont hit the chainstay but they are very close, a bit to close for comfort I thought (I can see the axle is very slightly off centre):
![]() ![]() |
![]() |
![]() |
![]() |
#16 |
Senior Member
Join Date: February 12th, 2010
Location: laconia
Posts: 303
|
![]()
With the crank torqued to 35 ft lbs remove the bolt and tae a pic of the end of the spindle. from the end of the spindle to the bed of the washer you should have a few mm. If not. the taper on the crank arm is worn out.
|
![]() |
![]() |
![]() |
#17 |
Senior Member
Join Date: February 12th, 2010
Location: laconia
Posts: 303
|
![]()
should look like this
|
![]() |
![]() |
![]() |
#18 |
Member
Join Date: June 13th, 2011
Location: Macclesfield
Posts: 58
|
![]()
I did find this while looking:
http://www.bikepro.com/products/bott...omptable.shtml As shown it says Topline need a 127.5mm bb. This works out as the chainrings are roughly 2mm or so out from where they were on the graftons and thats what its about really, the chainline and not where the crank arms are in relation to the chainstay. |
![]() |
![]() |
![]() |
#19 |
Global Moderator
Join Date: March 12th, 2009
Location: Tucson
Posts: 809
|
![]()
I have the sneaking suspicion it'll be easier to find a pair of Graftons or Cooks than a 127.5mm spindle.
__________________
1975 Witcomb USA, 1981 Chris Chance; 1984 Fat Chance, 1987 Team Comp, 1991 Yo Eddy, Monster Fat, and Wicked ....happy to have finally found a clean 80s Fat Team Comp with a box crown fork ![]() |
![]() |
![]() |
![]() |
#20 |
Senior Member
Join Date: June 1st, 2006
Location: rio de janeiro
Posts: 1,043
|
![]()
That's when you think "i so want to thread this bb shell.."
__________________
wanted: ride time. |
![]() |
![]() |
![]() |
#21 |
Senior Member
Join Date: February 12th, 2010
Location: laconia
Posts: 303
|
![]()
That's good. It would be a real shame to have a set of cranks like that,that had a bad taper.
Good find on the link..that will save a lot of time for peeps. I would work around what you have For spindle length.. Have fun cause that's what it's really about right? Cheers. |
![]() |
![]() |
![]() |
#22 | |
Member
Join Date: June 13th, 2011
Location: Macclesfield
Posts: 58
|
![]() Quote:
If only Rody still did stuff or someone from the axle group buy had one for sale. |
|
![]() |
![]() |
![]() |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
Thread Tools | Search this Thread |
Display Modes | |
|
|