Technical & Reference Section > Tech and Restoration

What chainring would go with PRIMO aluminium crank arms?

<< < (2/2)

Sanmarcopizza:
I can't say I have seen them cranks. I had Powerbites in my mind. Maybe you need to go to a bike shop and buy some chain ring bolts for an MTB. They do them in different lengths for if you are running 1, 2 or 3 chainrings on your crank.

skyway or the highway:
Yeah, that may well be worth checking out.

mark j:
Regular old school chainwheels are 3mm thick, I'm presuming the one you measured is more modern to handle grinding kinda tricks.....

skyway or the highway:
I think i've identified what the problem is. I've got two sets of crank arms in all, both with built-on spiders. The other one i have is a sugino setup with diamond back written on the arm aswell. With the bolt holes on that one, there's an inner recess, a kind of an inner circular ring where the bolt sits on, and through this it sinks almost flush on the front outside, in other words it lets the bolts sink deeper, thereby they can screw up better. The trouble is, i don't really want this crank, as i consider it too heavy.
With the primo set i've got, the bolt holes are much smaller, in fact they are the exact fit for the sugino bolts to screw into, but owing to the fact that there is no inner recess and they cannot drop down at all into the bolt hole, they hardly even come out the other side (if you see what i mean). So i is a bit between one place and another. I'm in limbo. Not quite sure how to proceed, I Know it would be simpler to go with a complete sugino setup, although usually quite expensive, but i kinda like the primo arms, they are very light, and i have them now. I probably wouldn't have got them if i knew they had different bolt sizes, but i didn't. It's all a bit like ggggrrrhhh. 
Can you suggest anything dude?
Martin

mark j:
I'm all lost now, take some pics and a more experienced brain might know the answer. Sounds like what San says, get longer bolts. But if you want any chainrings, chainwheels etc I got enough to sink a battleship........

Navigation

[0] Message Index

[*] Previous page