Chainrings bolts - how small is too small?

Posted on Thu 13th, September 2012

• #1

silentphoenix

Heya all,

I've just started to use my newly self made commuter bike and have not paid enough attention to loose bolts and I've lost 2 chainring bolts!

The crankset is a Shimano XT M750, which has M8 x 9.2mm boltsets. Unfortunately they are not so easy to find in Heidelberg (Germany) and was wondering how much of a difference using slightly short bolts would make. I was planning to buy some M8 x 8.5 from my LBS which I guess would leave the last 1.5 threads open.

Does this sound OK?

Cheers,

Nav
• #2

lot14

M8 X 10 and shorten them. Buy a spare nut put it on the bolt and then file them shorter - unscrew nut this will help clean the burr from the file.

Post a reply
- Bold
- Italics
- Link
- Image
- List
- Quote
- code
- Preview
Formatting Help

Don't worry about formatting, just type in the text and we'll take care of making sense of it. We will auto-convert links, and if you put asterisks around words we will make them bold.

Tips:

Create headers by underlining text with ==== or ----

To *italicise* text put one asterisk each side of the word

To **bold** text put two asterisks each side of the word

Embed images by entering:
![](https://www.google.co.uk/images/srpr/logo4w.png)
That's the hard one: exclamation, square brackets and then the URL to the image in brackets.

* Create lists by starting lines with asterisks

1. Create numbered lists by starting lines with a number and a dot

> Quote text by starting lines with >

Mention another user by @username

For syntax highlighting, surround the code block with three backticks:

```
Your code goes here
```
Just like Github, a blank line must precede a code block.

If you upload more than 5 files we will display all attachments as thumbnails.

For a full reference visit the Markdown syntax.