Slightly bent outer chainring.

robb_o

I've just replaced all 3 chainrings as I found a spare set in my shed.
The biggest "outer" chainring seems to have a slight bend in it when the cranks are spinning. It doesn't cause any performance issues really. Must of got bent when it was sat in my shed for years having stuff thrown on top of it. It literally must only be a couple of mm out.

Just wondering if anyone has any good techniques for getting it straight again?

cavegiant

A vice and a hammer.

Buckled_Rims

Place it on a kitchen unit top and try and judge where the bend starts. Use a marker pen to mark the high point and then use a vice and hammer

Or place the ring in between 2 pieces of wood and tighten the vice.

robb_o

Am I going to weaken the chainring in any way by bending it back?
I don't think we've got a vice at home, so could I put it between 2 bits of wood on the floor and whack the top bit of wood with a mallet?

.blitz

Mole grips & pliers?

If you're concerned about weakening it, I get worried when those hairline stress marks start to appear. I hit a rock once and took several teeth off the outer chainring but it still worked OK.