Post trail maintenance
Posted: Tue Jul 24, 2012 1:13 pm
Got a lesson in PM/post trail maintenance last night. Coming over the Tobin bridge from Revere (and delicious roast beef sandwiches at Kelly's) I started getting a vibration in the rear, by the time I was able to pull off on the Charlestown exit and off the road safely it was a heavy vibration. Hopped out, sure enough all of my lug nuts on the driver's side rear were loose, 3 of them were about to fall off. While tightening everything back up I snapped a stud...rode it home on 4 of 5. This was the first time I'd really driven it any more than a mile since going to MB on Saturday.
I ended up having to order new studs as these are the thread in style rather than press in, checked everywhere within bicycle distance from the house and all they had were press ins. I got 5 to replace all of them since most of them showed damage to the thread, and 5 more to sit on the shelf .
Question, does anyone actually check torque on their lug nuts, or anything else after wheeling? I always give everything a good visual inspection under the rig, check for play in the main suspension and driveline parts...but I've never broken out the torque wrench and actually verified torque settings, nor have I seen anyone do it.
My thoughts on what could have caused this...I'm guessing that repeatedly removing wheels, reinstalling them, and torquing them caused either the threads on the lug nut to stress/stretch or the threads on the stud. I definitely torqued everything to spec when I put them on.
I ended up having to order new studs as these are the thread in style rather than press in, checked everywhere within bicycle distance from the house and all they had were press ins. I got 5 to replace all of them since most of them showed damage to the thread, and 5 more to sit on the shelf .
Question, does anyone actually check torque on their lug nuts, or anything else after wheeling? I always give everything a good visual inspection under the rig, check for play in the main suspension and driveline parts...but I've never broken out the torque wrench and actually verified torque settings, nor have I seen anyone do it.
My thoughts on what could have caused this...I'm guessing that repeatedly removing wheels, reinstalling them, and torquing them caused either the threads on the lug nut to stress/stretch or the threads on the stud. I definitely torqued everything to spec when I put them on.