Need help installing a new Sinz bottom bracket

I've pulled the old bottom bracket from my son's Trek MT60 and am trying to replace it with a Sinz sealed bearing unit. There is a small protrusion or bump inside the bottom bracket shell on the frame that is keeping the new bottom bracket from easily going in. The old bottom bracket only had the ... Read More »

125mm Sinz crank arms for sale/trade/beer

I put my 5 year old on a 20" Giant XTC JR a little too early last year, and part of making it fit meant installing shorter crank arms. Stock were 140mm, which was a huge jump from the 92mm crank arms on his 16" Hotrock. Anyway, long story short, he's grown (as kids do) and I just put a new set of ... Read More »

$5,445.00 for a Sinz crank?

I was bummed when I missed out on the sq taper Sinz cranks that were going on ebay for only $25 and I am finding it had to cough up $50 for one now. But that seems a bargain compared to this one! [url=]Amazon.c ... Read More »

Sinz ISIS cranks -- what BB axle length?

After reading a few threads here, I bought a 135mm Sinz ISIS crank from eBay for my son's 20" bike. It currently has ~156mm cranks on it which are way too long, and I'm hoping the 135mm's are short enough. The current cranks have a ~47mm chainline. I need to buy a BB, but can't find anything on ... Read More »

Sinz cranks and BB

So I'm getting ready to order the Cranks and BB for my son's build. I was wondering what other thoughts are on the size for the BB. I know it's either 113 or 108. Since I'm using a extra small 26 inch frame and the crank is a single chain ring, would I be better off with a 108 for the chain l ... Read More »


Sinz Product Categories



MTBR on Facebook