MrJamie
Oaf on a Bike
Thought id post separately to the other clicky BB thread on here 
Basically on my hybrid ive noticed a click or metal on metal tap noise that happens when im pedalling under heavy load. It happens roughly at the point where either pedal is pushed most of the way down (ie. the 4-5pm position on right side, 8pm from left). So if i try to push up a hill out of the saddle its clicking with every pedal stroke, some clicking when accelerating hard but nothing the majority of the time.
Ive derailled the train onto the inside and the BB spins freely, i can throw it for several rotations so doesnt seem to have any friction problems or make any noise. I also cant feel any lateral movement in the cranks, it looks fine. Ive also checked the area for cracks and all looks fine.
One thing i have noticed is that the frame (Giant Roam) is quite flexible (alu), when i stand still at say traffic light and lift my weight on and off the right pedal you can see the lower part of the frame flex and if i really squeeze the rear brake the seat stays flex. At the weekend i tried my friends Specialized Crosstrail (virtually same bike) and i make the frame flex just as badly both with my weight and on the brakes. So im edging towards thinking im putting quite a lot of strain on the components by being a big bugger at >120kg with rather strong legs from running(and squats) and a relatively low cadence.
Anyway, the noise sounds exactly like every other unknown bike metallic noise, I wondered if the flex could be causing the chain to tap the deraillieur, but its the same in different gears (so long as theyre high enough to grind). Should I be alright leaving it until it starts to sound like crap or could it seize? According to the spec sheets its a Shimano UN26 which costs £6 and has done over 2500 miles.
Basically on my hybrid ive noticed a click or metal on metal tap noise that happens when im pedalling under heavy load. It happens roughly at the point where either pedal is pushed most of the way down (ie. the 4-5pm position on right side, 8pm from left). So if i try to push up a hill out of the saddle its clicking with every pedal stroke, some clicking when accelerating hard but nothing the majority of the time.
Ive derailled the train onto the inside and the BB spins freely, i can throw it for several rotations so doesnt seem to have any friction problems or make any noise. I also cant feel any lateral movement in the cranks, it looks fine. Ive also checked the area for cracks and all looks fine.
One thing i have noticed is that the frame (Giant Roam) is quite flexible (alu), when i stand still at say traffic light and lift my weight on and off the right pedal you can see the lower part of the frame flex and if i really squeeze the rear brake the seat stays flex. At the weekend i tried my friends Specialized Crosstrail (virtually same bike) and i make the frame flex just as badly both with my weight and on the brakes. So im edging towards thinking im putting quite a lot of strain on the components by being a big bugger at >120kg with rather strong legs from running(and squats) and a relatively low cadence.
Anyway, the noise sounds exactly like every other unknown bike metallic noise, I wondered if the flex could be causing the chain to tap the deraillieur, but its the same in different gears (so long as theyre high enough to grind). Should I be alright leaving it until it starts to sound like crap or could it seize? According to the spec sheets its a Shimano UN26 which costs £6 and has done over 2500 miles.
