I was pretty happy with the ride this Sunday, climbed a few long hills, beautiful scenery along the way, totalled about 150km
So I've forgotten about it yesterday. I'll see what the LBS will say tomorrow and report back.
Originally Posted by
rpenmanparker
OP, are you saying the bolt and rear "nut" aren't spinning freely or coming apart, but you just felt the threads starting to deform? Is that what you mean by stripped, but on there and tighter than the rest? Fully engaged, very tight, just damaged? Or did you mean the hex and/or Torx openings were stripped, not the threads at all. If either of those is the case, I would just let the whole thing be and not worry about it until it is time to change rings again, which may be never. If the rings are on good and tight on all five bolts, I wouldn't risk a further screw up using the drill. Unless of course, the aesthetics are a problem. I certainly understand that.
If it is the heads that are stripped, not the threads, there are other solutions like "easy outs" or even an impact wrench might be helpful.
Robert
The bolts are on there very tight. If you try to unscrew the nut from the back the front bolt turns with it. You'd want to hold onto the front so you can unscrew the back but the torx
head has been stripped
Yeah, used the wrong term.
Probs not gonna use an impact wrench ey :O I thought about leaving them on too. But if it's relatively easy to drill it out, then I think I'd replace it
Here's one of the bolts. Just marked it with a permanent marker.
Originally Posted by
KevinF
It's been a long time since I've swapped chainrings, so I don't recall the torque measurements I used... Snapping a bolt at well under torque measurements is probably because it wasn't going in straight or that the threads on the bolt weren't lubricated.
I'm pretty sure the engineers who came up with the torque measurement didn't just pull a number out of their ass.
Haha, I did lube them. I'm an engineer too, and sometimes I pull numbers out of my arse... nah lol jk
Originally Posted by
Bob Dopolina
You need to drill straight through the front AND rear part of the bolts. Don't count on saving any of these parts.
Thanks for the tip.
Originally Posted by
svtmike
With a Torx on the outside and a 6mm hex socket on the inside, it's very easy to get the chainring bolt to 9.8mm. You did realize that is a Torx and not a hex on the outside, right?
Yeah I used a torx wrench.