Chainring bolts that you must not buy.

[Andrew Park]

Recently, I was looking for shimano 4-arm bolts and purchased two bolt sets in amazon and ali-express.

One is shimano 4-arm only chainring bolts.

http://www.amazon.com/gp/product/B00JNAHRW2/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

I think they will not fit, because the nut put from the outer. However, length is well enough long.

Other is titanium chainring bolts.

http://www.aliexpress.com/snapshot/6458150753.html?orderId=65485578709545

Sellers' specification says bolt lenghts is 6.5mm, but it is 5.1mm in the real size.

and the length of nut that reaches in the crank is 3.4mm except nut head.

what was worse is head diameter is smaller thant other bolts.

I used them every bicycle I got, you can`t use them on double chainring, single chainring with adapter.

even you can barely use it on fixie.

I write this post to hope there will be no one who made mistake like me.

I will also write a review about shimano chainring bolts after I install them.

Original text by kij854 in Doval official cafe