Craigmount
Old School Hero
Hi folks, I hope someone can give me a few pointers on where I’m going wrong!
I’ve had say 12 to 15 punctures in the past 12 months, all on the rear wheel. Both Presta and Schrader valves. The punctures are always around where the valve metal sleeve meets the rubber tube. See pics 1 and 2.
The inner tubes are nothing special, a variety of what’s available locally e.g. Continental, Halfords, etc.
This all started last year when I bought a new Kenda folding bead tyre from Halfords, to replace a fixed bead tyre on my Cannondale (which has Mavic 117 rims).
This tube lasted 2 weeks, and so did the next, and the next ………………
The Cannondale developed a fork collapse, so I switched to the Stumpjumper!
This was fine to begin with, until I replaced the rear tyre with a pre-used folding bead IRC Mythos tyre.
And once again I had the repeating puncture problem, this time a Mavic 517 rim. See pic 3.
1. Inner tube size is usually up to 2.5 and the max tyre size on my bikes is 2.1
2. I switched the Kenda folding tyre to the “old faithful” Specialized Hardrock (Araya rims), and lo and behold: no punctures so far (see pic 4).
3. I always try to keep tyre pressures up, however I only have a hand pump, no foot pump.
What might be causing this regular (exasperating) routine? Is it the folding bead, or the rim, or the tyre pressures, or a combo, or anything else?
Any thoughts or comments wold be much appreciated.
I’ve had say 12 to 15 punctures in the past 12 months, all on the rear wheel. Both Presta and Schrader valves. The punctures are always around where the valve metal sleeve meets the rubber tube. See pics 1 and 2.
The inner tubes are nothing special, a variety of what’s available locally e.g. Continental, Halfords, etc.
This all started last year when I bought a new Kenda folding bead tyre from Halfords, to replace a fixed bead tyre on my Cannondale (which has Mavic 117 rims).
This tube lasted 2 weeks, and so did the next, and the next ………………
The Cannondale developed a fork collapse, so I switched to the Stumpjumper!
This was fine to begin with, until I replaced the rear tyre with a pre-used folding bead IRC Mythos tyre.
And once again I had the repeating puncture problem, this time a Mavic 517 rim. See pic 3.
1. Inner tube size is usually up to 2.5 and the max tyre size on my bikes is 2.1
2. I switched the Kenda folding tyre to the “old faithful” Specialized Hardrock (Araya rims), and lo and behold: no punctures so far (see pic 4).
3. I always try to keep tyre pressures up, however I only have a hand pump, no foot pump.
What might be causing this regular (exasperating) routine? Is it the folding bead, or the rim, or the tyre pressures, or a combo, or anything else?
Any thoughts or comments wold be much appreciated.