Originally Posted by
Hypno Toad
I took the bike in question on a 100 mile yesterday and I'm 99% certain its a spoke tension issue. The wheel is true, but spoke tension is not the same around the wheel. I cleaned the wheel before the ride, checking for any loose spokes. The bike was quiet for the first 20 miles, at mile 35 and 65 I check for terribly loose spokes, but found none that were totally soft (like I found last week). However, after the first 20 miles, the 'rrrtttt, rrrttt, rrrttt' noise was back, only under hard pedaling - coasting is silent.
I plan to have my buddy at the LBS go over the spoke tension, then test it again (likely less than 100 miles). I'll post finding once I get this all done.
Be interesting to get the specifics of this build.. spokes, rim, tension levels of each side.
I built a 24H triplet last month with a 36H hub... hub I had on hand having spokes that fit onhand. DS was Sapin Lasers with NDS Sapim Strong. Finished tension with
TIRE ON was 82-62NDS.. owing to the 1x heads in NDS lacing which is my preference. No reason to lace trips so tight albeit this is the lowest tension level in a rear I've road for many miles (1700). Wheel road nice... no issues per flex etc as I'm easy on wheels at 200 lbs... which is supposedly over a recommended wt for a 24H 16-8. Yet.. under load as above... it talked a little. At disassembly... replacing with a 32H hub... needing the 36 for a 27H 18-9 G3... I took careful tension readings. One triangle showed one spoke doing a good deal more work (higher tension than it's mate). That.. combined with the low tension I assume allowed the wheel to 'give voice' under strain.
I ran a 18-10 trip of my own lacing pattern... NDS 2 radial with 4 1x... at similar low tension of start... felt too soft being even under the 82-62 range. I cranked to the 95-80's range and it went 4000+ quiet... one minor truing in route only.
Latest 'trip' is the G3 27H.. built with an 18H rim drilled out... great 30 buck buy on the slimbay for a new Kinlin 300 with some goofy aftermarket labels that I peeled. This one is around 90's-80 NDS (tire on).. all Sapim Lasers. Quiet firm wheel.
Triplets do not require high DS tensions to get left sides taunt. Lower tensions mean better durability.. no messing with glue or 'prep' in a build.. simplicity.. which the average rider fails mostly to grasp.
Final build tension stats minus tire mounted are meaningless. Run your tension meter around the mounted up wheel.. does go down after inflation... usually.. around 15%.