Noonievut

I have GRX 400 hydros and I’ve noticed that when loosening the calipers (flat mount on the fork) the top bolt loosens nicely after a 1/4 turn but the bottom bolt needs 2-3 turns to feel as loose as the top bolt.

Reason I ask is because when holding the brake lever and tightening the bolts to align the pads, Sometimes I can’t get them aligned, and I’m wondering if it’s the re-tightening of those bolts (which bolt first, how much to tighten and the slow back and forth that needs to be just right). I seemed to get it right today and all is good. Anyway, just curious thanks!

mack_turtle

Are you using the appropriate setting on your torque wrench?

Noonievut

Unfortunately my torque wrench head hits the calliper and my wrench doesn’t have an a go-between it and the bit.

veganbikes

I would try getting an extension then, if it is a 1/4 drive this will solve ya.

DaveSSS 

I'd guess that the hydraulic hose is pushing on the caliper. 1/4 turn isn't much, but no more than a turn should loosen any bolt. I have cable operated hydraulic calipers and I have to remove the stiff compressionless cable housing entirely before centering the calipers.

Noonievut

Thanks!

i wasn’t sure about putting an extension on a torque wrench and whether it would impact it in anyway. I have a Canadian Tire by me that sells tools and stuff

veganbikes

You should be OK for something like that. So long as it isn't super loose and imprecise you shouldn't have too big of an issue.

Keep in mind that department stores are not great for buying tools. All kinds of cheap stuff sure but quality is generally not the space of places like that. When buying tools it is always a good practice to buy the absolute best tools you can unless of course it is literally a disposable tool you are only using once and getting rid of which is not something common and not something I would recommend.

jadocs

It's better than nothing...quick question though, how are you aligning the caliper after you loosen it? If you are just loosening and putting the brakes on, then tightening....your hose may still prevent the caliper from lining up properly. I have had to position it by hand on a friends bike...then tighten.

Noonievut

This is what I’ll be doing in the future per yours and another’s recommendation. Thanks!