what are these?

[oldscholar]

I bought a new Shimano gear cable guide, the sort that fits under the bottom bracket and it came with these two rubber things in the sealed packet. They're labelled 10mm, left and right. Any ideas what they are?

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[jamabikes]

they are used to alter the reach on road sti brake levers.

 

[oldscholar]

thanks! you learn something every day