bottom bracket for singlespeed

plain lazy · Jun 6, 2009

I am building up a singlespeed but have not got the bottom bracket. As singlespeeding puts greater forces through the crank, should i opt for a beefier BB, something designed for freeriding over a light weight XC or wont it matter. This is my first singlespeed attempt so i'm green on the subject. oH and while i'm here, does anyone wanna sell me a 1. 1/4 quill stem.

cheers

Mark

Xesh · Jun 7, 2009

Personally I use a steel BB axle for SS. It doesn't have to be a freeride/DH BB though (mine's a Middleburn cromo).

The cost and weight saving for the Ti ones aren't really worth it. That plus Ti is more fragile than steel anyway (most Ti BB manufacturers will state a max rider weight limit). Besides as you're dumping all the gears an extra 150g in the BB won't make much difference anyway.

REKIBorter · Jun 7, 2009

Any part of a SS drivetrain should be as strong as you can get it, don't go lightweight whatever you do. Steel is your friend

Harryburgundy · Jun 7, 2009

I've had Ti and it was fine...but steel is good enough.
What you havn't mentioned is the type of BB you are using.
Surely square taper

Russell · Jun 7, 2009

Does singlespeeding put the drivetrain under more stress?

Whats the difference between a fit rider pushing a 32/16 gear up a hill on a geared bike and a singlespeeder pushing a 32/16 up a hill?

Be interested to know if there is any data on this.

barry2017 · Jun 7, 2009

^^what he said^^

I suspect it **feels** like it's harder work, but actually it isn't.
I'd say steel over Ti for a bottom bracket anyway, though.

lewis1641 · Jun 7, 2009

I have an inch and quarter nos boxed control tech quill stem i'm about to put on ebay. Its quite long- 140 from memory. Looking for 22 quid posted if you are interested

marky2484 · Jun 7, 2009

Bog standard shimano sealed b/b, in the appropriate length . B/Bs fitted to my stock single speeders have been lowish quailty oem generic efforts - never had a problem.

mikee · Jun 8, 2009

yup what he says
un 52,72 last ages

reanimation · Jun 8, 2009

Russell":3ui291by said:
Does singlespeeding put the drivetrain under more stress?

Whats the difference between a fit rider pushing a 32/16 gear up a hill on a geared bike and a singlespeeder pushing a 32/16 up a hill?

Be interested to know if there is any data on this.

This is something I have wondered for a while. :?: :idea:

I suppose if anything, you might occasionally use more torque to get up the hill in that single gear where you'd wimp out n change down. All I can come up with.

bottom bracket for singlespeed

plain lazy

Dirt Disciple

Xesh

Senior Retro Guru

REKIBorter

Harryburgundy

Russell

Old School Grand Master

barry2017

Old School Grand Master

lewis1641

marky2484

Senior Retro Guru

mikee

reanimation

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