It's steel (531) as it's a galaxy twin. I have not considered the kiddy cranks as fitting them looked like a tricky job to me. How do you fit them to? It's very kind of you to let me borrow yours.
They're (mostly) pretty straightforward to fit.
Assuming that you have a crossover drive, then you take the chain ring off the left hand side and fit a second ring on the inside of the spider (I'm not sure what the BCD is on my chainset, I'll try and measure it). Then put the outer ring back on and hook the sync chain back up.
Once you've finished swearing, then the kiddycranks just bolt onto the stokers seat tube with four bolts. But it's a good idea to put some tape of some sort onto the tube so that it doesn't get scratched.
You can't put the kiddy cranks too low, unless the ring side on the kiddy cranks and below it are the same, otherwise the kiddy cranks and the stoker chainset will clash.
Finally just put the chain onto the kiddycranks (I keep a quick link in it).
I'll try and get round to the garage one evening this week to take it off and measure the spare ring.
When I do take it off or put it on, I normally put a couple of cable ties around the sync chain & rings to hold everything in alignment and stop the chain slipping off. It cuts down on the swearometer a little.
