O Rings....

[rosstheboss]

How do you work out what size o ring you need when the one that you had to measure could be anywhere on the South Downs?! Its from the axle on my Marzocchi QR20 forks..... Or is it just 'a bit bigger than 20mm'?

 

[big.eck]

the inside size of the o'ring will be 20mm

 

[rosstheboss]

It sits (or used to sit!) in a little recess though... how much give do they have in them? Do I need to be really precise?

 

[dyna-ti]

I got a big box of o rings from lidl.
Cost £1.99
box of 125 total
sizes included are -
3.15,4,5,6,7.1,8,10,11.2,11.8,14,16,17,18,19,20,22.4,23.6mm


The smaller sizes you get about 10 of,the larger about 6.

 

[big.eck]

It sits (or used to sit!) in a little recess though... how much give do they have in them? Do I need to be really precise?

an o'ring should streach a good 2mm with no problems .