Overkill, or is it me?

[GParkes]

Swapping my SRAM 2X crankset to 1X and need and 18"/24" ratchet and someone to hold the bike to remove crank bolt. 53 NM???? Really, does the spec need to be that high? I can't be the only one that thinks anything above 40 NM is unnecessary.

[fmradio516]

Yeppp the SRAM cranks are torqued SUPER tight.

[.RJ]

the loctite isnt helping here. at least you got it off.

[bikeboy1]

Yeah I would agree anything over 40 is over the top. Campy cassette fastener comes to mind at 50nm as well. If 40 wont hold it then there is always loctite as long as we dont use the Red stuff.
In fact I cant think of too many times in the industrial setting that I have used anything over 50.

[jds108]

Since I just got done reinstalling a wheel on my Ram Promaster and the lug bolt spec is 145 ft lb, the 50 NM (37 ft lb) doesn't seem so excessive.

[oldpotatoe]

Originally Posted by jds108

Since I just got done reinstalling a wheel on my Ram Promaster and the lug bolt spec is 145 ft lb, the 50 NM (37 ft lb) doesn't seem so excessive.

No kidding...now threads about torque that seems 'too high'......big sigh...

[Red Tornado]

IIRC the old square taper crank arm torque specs were in the 25 - 40 Nm range. I could achieve that with a standard Craftsman beam torque wrench. 50 seems a little higher than anything I ever worked on.
I never tightened cassettes to 40Nm, either. Usually stopped around 30Nm, never had one come off or get loose on it's own, but much easier to remove when I needed to.

[sasquatch16v]

you see, because you don't have a FD anymore to drop the chain... you have to make sure the cranks are tight enough that they don't just fall off to drop the chain instead.

[Talrand]

Originally Posted by Red Tornado

IIRC the old square taper crank arm torque specs were in the 25 - 40 Nm range. I could achieve that with a standard Craftsman beam torque wrench. 50 seems a little higher than anything I ever worked on.
I never tightened cassettes to 40Nm, either. Usually stopped around 30Nm, never had one come off or get loose on it's own, but much easier to remove when I needed to.

I've seen people recommend ~50Nm for alloy body HG cassettes to limit the 'bite marks' steel cogs can make. Using steel HG bodies I haven't tried it, but a lot of WW users said it helped them and did not cause other issues.

[pdonk]

At least it is not the 120 NM of a frameworks crank.

https://escapecollective.com/wp-cont...ry-tour-24.jpg

[Dave]

I use Shimano cranks on my AXS drivetrains. Much easier to deal with.

[benb]

And yet we have all complained about cranks or BBs coming loose or making noise.

Not going to disagree with any complaints about SRAM cranksets really though.

I had a bike built up XT at the shop many years ago and raced it the very next day and the cranks came lose in the race... Luckily they didn't completely fall off..

[GParkes]

I'm just flabbergasted, though. The GXP cranksets had torque specs in the 15 NM range, or thereabouts if I recall. How did they get from that to 53??? Anyway, just a vent....

[.RJ]

Originally Posted by GParkes

I'm just flabbergasted, though. The GXP cranksets had torque specs in the 15 NM range, or thereabouts if I recall. How did they get from that to 53??? Anyway, just a vent....

GXP cranks were in the similar (50+) Range. No need to go that far though, IMO.