11-17-2011, 07:56 AM
Hi guys,
I keep on getting punctures on my commute (3 in the last 2 days - 9miles each way in London). It's a specialized sirrius with 700x32, and I'm using 28x38 tubes.
I've had about 20 in 3 months now, and a week or so ago I noticed that there was a sharp piece of metal poking through the rim tape. It wasn't in line with the spokes, so I'm assuming it's a manufacturing defect as I haven't hit anything that could cause it. I peeled up the tape, knocked it flat, and lay another tape on top of the original for extra protection (I don't care about the extra weight)
After that, I've had about 4 more punctures but all of these were on the opposite side of the tube from the valve i.e. not next to the rim.
tyres were inflated fairly hard (80-90 psi) so I don't think these were pinch flats? or could they be? My normal commute is 100% road, but in London there are a lot of pot holes etc
I rode over a screw a few weeks back and it cut into the tyre (no puncture though!) and there's a 3-4mm slit that you can see from the inside. Could this be an issue - letting debris in?
I'm partially inflating the tubes when changing so they don't twist/snag, checking the tyres for any glass/thorns etc but can't find anything?
Does anyone have any thoughts or pointers?!?!??!
Thanks in advance!
I keep on getting punctures on my commute (3 in the last 2 days - 9miles each way in London). It's a specialized sirrius with 700x32, and I'm using 28x38 tubes.
I've had about 20 in 3 months now, and a week or so ago I noticed that there was a sharp piece of metal poking through the rim tape. It wasn't in line with the spokes, so I'm assuming it's a manufacturing defect as I haven't hit anything that could cause it. I peeled up the tape, knocked it flat, and lay another tape on top of the original for extra protection (I don't care about the extra weight)
After that, I've had about 4 more punctures but all of these were on the opposite side of the tube from the valve i.e. not next to the rim.
tyres were inflated fairly hard (80-90 psi) so I don't think these were pinch flats? or could they be? My normal commute is 100% road, but in London there are a lot of pot holes etc
I rode over a screw a few weeks back and it cut into the tyre (no puncture though!) and there's a 3-4mm slit that you can see from the inside. Could this be an issue - letting debris in?
I'm partially inflating the tubes when changing so they don't twist/snag, checking the tyres for any glass/thorns etc but can't find anything?
Does anyone have any thoughts or pointers?!?!??!
Thanks in advance!