Replace stem bolts

kokoman
Posts: 47
Joined: Thu Feb 17, 2011 9:32 pm

Replace stem bolts

Postby kokoman » Wed Jan 23, 2013 6:10 pm

They're rusting on my Roubaix SL2 2011. How do I find out if they are M4 / M5 etc, and the length that I need?

User avatar
RonK
Posts: 8131
Joined: Mon Aug 24, 2009 2:08 pm
Location: Brisbane, Queensland
Contact:

Re: Replace stem bolts

Postby RonK » Wed Jan 23, 2013 6:35 pm

kokoman wrote:They're rusting on my Roubaix SL2 2011. How do I find out if they are M4 / M5 etc, and the length that I need?

It would be a pretty safe bet they are M5, but they cost bugger all anyway so if in doubt order both. Take one out and measure the length.

Then get on to Bolts Nut and Screws Online. They are based on the Gold Coast and their service is excellent.

Get the stainless steel screws so they don't rust again. They are so cheap I have felt guilty about the size of my order and bought extra screws to pad it out a bit.
Cycle touring blog and tour journals: whispering wheels...

kokoman
Posts: 47
Joined: Thu Feb 17, 2011 9:32 pm

Re: Replace stem bolts

Postby kokoman » Wed Jan 23, 2013 11:46 pm

much appreciated and thanks for the link!

User avatar
twizzle
Posts: 6386
Joined: Wed Aug 13, 2008 11:45 am
Location: Taking a break.

Re: Replace stem bolts

Postby twizzle » Thu Jan 24, 2013 10:55 am

Tread carefully, tensile strength of stainless is lower than that of carbon steel. Torque requirement will be lower, and so will the clamping force.
I ride, therefore I am.
...real cyclists don't have squeaky chains...

User avatar
Nikolai
Posts: 298
Joined: Wed Feb 29, 2012 9:55 pm
Location: Brisbane
Contact:

Re: Replace stem bolts

Postby Nikolai » Thu Jan 24, 2013 2:23 pm

RonK wrote:
Then get on to Bolts Nut and Screws Online. They are based on the Gold Coast and their service is excellent


I need some of those. How are they measured? The entire length or the length of the thread?

User avatar
find_bruce
Posts: 5972
Joined: Mon May 09, 2011 8:42 pm
Location: Sydney

Re: Replace stem bolts

Postby find_bruce » Thu Jan 24, 2013 3:08 pm

Nikolai wrote:
RonK wrote:
Then get on to Bolts Nut and Screws Online. They are based on the Gold Coast and their service is excellent


I need some of those. How are they measured? The entire length or the length of the thread?

Traditional way of measuring bolts is from the end to the shoulder - ie the entire length except for the head.
Image . . . . . Image

User avatar
Mulger bill
Super Mod
Super Mod
Posts: 28269
Joined: Sun Sep 24, 2006 2:41 pm
Location: Sunbury Vic

Re: Replace stem bolts

Postby Mulger bill » Thu Jan 24, 2013 8:14 pm

twizzle wrote:Tread carefully, tensile strength of stainless is lower than that of carbon steel. Torque requirement will be lower, and so will the clamping force.

This is the sort of stuff that everybody needs to know, thanks again Twizz. :)

Shaun
...whatever the road rules, self-preservation is the absolute priority for a cyclist when mixing it with motorised traffic.
London Boy 29/12/2011

Who is online

Users browsing this forum: silentbutdeadly