WDB
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Post by WDB on Apr 19, 2019 17:19:34 GMT
Just back from the woods. Learned a bit about tubeless tyres — specifically that their valve stems don’t play nicely with a threaded pump tube. Took Travelling Pit Crew and me a good half-hour to solve that one; lucky we weren’t racing the weather or the daylight.
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Post by tyrednexited on Apr 21, 2019 8:17:56 GMT
Just back from the woods. Learned a bit about tubeless tyres — specifically that their valve stems don’t play nicely with a threaded pump tube. ....yeah....you need Woods valves for that. ;-) Seriously, I thought most tubeless cycle valves were pretty standard "Presta" fitting. If your connector was for Schrader valves, I can see the problem you would have. (You can - or at least could back in the day of the old-fashioned cycle pump - buy connector tubes for either). (I have Woods valves on both the German e-Bikes. Different construction, but same connector as a Presta. They "seize" in use, and take an awful amount of initial pressure to open them when pumping up - even a track pump struggles sometimes).
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WDB
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Post by WDB on Apr 21, 2019 8:41:15 GMT
Are Woods valves the ones with a little rubber sleeve over the inner part of the stem, that the pump has to force open? Had those on my first bike 40 years ago and practically gave up riding it because no amount of effort with my cheap aluminium hand pump would get any pressure into the tyres.
The new tyres have Presta valves, and are simple enough to inflate with a mini-pump. The problem we had was disconnecting the pump hose without unscrewing the valve core, which the pressure within then ejected at great speed — closely followed by most of the air. We worked out a removal technique that required two hands on the pump and even on the valve, which clearly has disadvantages in terms of solo rides. I’ve ordered a mini-pump with a snap-on connector instead.
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Post by Humph on Apr 21, 2019 8:47:18 GMT
I hate Prestas. If necessary I drill out rims to fit Schraders. Not at all into tubeless either. Modern fandangled nonsense. 😠
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WDB
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Post by WDB on Apr 22, 2019 10:06:35 GMT
This is my first bike with Prestas and I’ve always found them fiddly compared with Schräders. But I’m not sure this bike — or Boy1’s — would have enough rim to drill out for a bigger valve.
Anyway, they’re only tyres and can be changed if I don’t get on with them. I’m putting this incident down to familiarization.
I’ve bought a torque wrench too. I’m going to tighten that slipping seat post right up to the limit. That’ll teach it.
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Post by tyrednexited on Apr 22, 2019 12:04:03 GMT
I’ve bought a torque wrench too. I’m going to tighten that slipping seat post right up to the limit. That’ll thread-strip it. ...there, corrected it for you..... I hate alloy components like this. Getting them really tight so often appears to be beyond the recommended torque limit. For the seat post, whilst not as neat I much prefer a clamp. If it strips and the half into which you are tightening isn't "blind", you might find a good solution is to source a slightly longer bolt, and go through to a nut on the other face. Not as neat, but very effective.
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Post by Humph on Apr 22, 2019 12:26:16 GMT
Or, cut back on the pies... 😉
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Post by Humph on Apr 22, 2019 13:36:25 GMT
What I actually suspect, notwithstanding any possible pie issues, is that someone has turned the bike upside down while setting it up. This can lead to lubricant travelling up the down tube and contaminating the surfaces of the seat post / down tube.
I'd take the seat post out and thoroughly clean the inside of the down tube and the seat post with dry kitchen towel so that both surfaces are thoroughly "dry" before tightening the seat post clamp any more. As T&E says, you could easily strip the thread by over tightening.
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WDB
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Post by WDB on Apr 23, 2019 19:17:29 GMT
I think you mean ‘seat tube’ but it seems OK. New wrench (which is a rather nice piece of kit, with a little autographed calibration certificate in the case) suggests I had the clamp (which is a proprietary Whyte device, concealed inside the tube) torqued about right — 14Nm. If it doesn’t hold next time out (full day of conf calls denied me the opportunity today) I’ll bother the shop about displaced lubricant.
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WDB
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Post by WDB on Jul 7, 2019 16:21:16 GMT
Well, it’s been a nice week for cycling down Vaucluse (Enclave des Papes — John XXII in 1316ish arrived feeling a bit queasy, drank some of the local wine, felt so much better that he bought the town) way, and we have another to come. 7am starts to get back before the heat gets too fierce, but that’s all right as we can pick up breakfast in town on the way back to our little olive-shaded garden. My tubeless tyres had their first test this morning: there was a strange noise and a little rooster-tail of white juice from the back wheel, which turned out to be issuing from an identifiable hole, although it wasn’t clear what had made it. After maybe 20 seconds it stopped hissing, and a minute’s work with a pump restored the lost pressure. Contrasts well, I think, with Boy1’s front tube, which took a puncture earlier this morning. That required the front wheel off and the full tube-replacement palaver — which, I have to say, he managed with minimal fuss. Boy2, meanwhile, is cross that his iron-bedstead hardtail is so slow on good and even moderate roads that he’s given up riding it altogether. Disappointing but understandable; I’d be content to match his pace for the sake of an outing, but Boy1 is like lightning on anything smooth and just disappears. He’s now got me thinking of a 700C hybrid I might ride to town at home but that would be fast enough to be his on-road holiday bike. Since he and I are near enough the same size, it might just work — but guess who’d be paying for it!
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Post by Humph on Jul 7, 2019 17:48:23 GMT
Probably too much faff while you're on hols, but if B2 were to put some slicker tyres on his hardtail it'd be significantly quicker on smooth surfaces. Hell of a drag from off road tyres when you're not off road. Or, at least put a bit too much air in his tractor tyres, it'll help a little.
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WDB
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Post by WDB on Jul 8, 2019 6:37:00 GMT
Thanks Humph. Funnily enough, he’d already done that at home — although even the new tyres look pretty brutal to me. I think it’s more an attitude thing; he’s defined himself as a badass who crashes through the woods, and trundling along tarmac — unless it’s just the short distance he does from home to get to the rough stuff — is just not his style.
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Post by Humph on Jul 8, 2019 7:32:10 GMT
To be honest, I'm of a similar mind. I will cycle on roads, even busy city centre ones, but only to get somewhere, not particularly for leisure / pleasure. I'm much happier on a loose trail in a forest or up a mountain. Don't especially enjoy being anywhere there are motor vehicles. You can be as careful as possible, and as courteous as you can, but some drivers are still apparently intent on making it as difficult as they can for you, or worse...
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Post by Deleted on Jul 8, 2019 8:23:45 GMT
Spent a bit of time faffing with our fleet of cheapo Decathlon/Halfords bikes this weekend in preparation for holiday to Vendee next week. We use some forest trails most days when we're out there, and youngest (daughter) struggled last time with the slicks on her hybrid type bike. So I've swapped them for some knobbly jobbies which will hopefully help. They're not full on knobblies, they're kind of knobbly edged, and smoothish in the middle IYSWIM. They came off an old, outgrown bike of my son's which has the same 24" wheels. The rest of us have knobblies already.
Other than that, checked all the lights, lubricated chains, checked box of spares/tools for all necessaries, and we're all good to go. Roof rack and bikes get installed in Friday night, then off on Saturday morning to the tunnel. All car checks also carried out, fluids and that, tyre pressures etc. Then I replaced the knackered mortice lock on the garden gate for extra Dad points. Earned my couple of tins of Beavertown Neck Oil and half a bottle of red with dinner (BBQ, cooked by my fair hand, natch), so I did.
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Post by Humph on Jul 8, 2019 8:28:37 GMT
We're heading to a different part of France this year, down near Perpignan. Apparently there are some good trails for the bikes. Proximity of the Pyrenees is a bit of a worry though. Steep in parts I gather...
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