I’VE GROWN HALF A CENTIMETER AND SHOT UP AN INCH
Finally got the crankset changed on the Bob Jackson. I’ve grown half a centimeter and shot up an inch! Well however many more gear inches 48-18 is above 47-18.
Not polished like the 165mm one (shown in the lower pictures) that was on it, but the 170mm was very close to NOS and a bargain. The longer length feels surprisingly more comfortable, wasn’t expecting that. And riding downhill home was way more fun.
PROPAGATION AND POLISHING TO COME!
Been 6 months spent meaning to get this switched! I thought the old driveside one was getting hairline cracking at the spider but it never developed.
I’ll probably stick a post up showing how to clean and polish it back up to it’s mirror finish, and file where these sets were prone to hairline cracks appearing. That will make sure I stop any risk of them propagating. Read about doing that on LFGSS. Supposedly some people even filed the brand new Campagnolo cranks of this era to alleviate crack propagation. They were meant to be notoriously brittle, so rounding off where the spider meets the crank arm helps prevent this.