Road Cycling Essentials

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godinman said:
Had a look at the inner tube of from last puncture, and it has actually split on the inside (rim side) of the tube, how can this be?
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Pinch puncture? (where the tube gets pinched between something on the road and your rim - usually caused by too low pressure in the tube)
 
I had pumped it up to 100psi that morning before I left for work, the puncture occurred on the way home from work - it couldn't have dropped that quickly could it?
 
Dimple said:
That explains why you're only riding as fast as a runner.

Since I thought about cycling and then made the decision I constantly watch cyclists on the road (BEFORE MY BIKE ARRIVES :().
In 99% of watching MTBs (on the road) it looks like they are struggling and my wife is bored of me pointing it out.
It seems like their legs are going round more than the wheels are going forward.
Compare that to somebody on a road bike and their legs are hardly going round while they are going quite a distance.
Of course I do see the odd road biker who seems to be stuck in gear 1 and look like they aren't getting very far.
I also find it amazing how so many (mainly) MTB'ers are riding what look like their younger brother or childs MTB.
I see one bloke in a morning and his knees nearly hit his chin.
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well is all down to gearing (mtbs generally run a 42 / 32/ 22 set up with a larger rear sprocket, but also they have smaller wheels. Add into the fact that mtb tyres are ridiculous on roads I have a mtb and use it as my training bike butt have a second set of wheels with a set of road tyres on and it makes it so much easier rather than riding on knobbies !
 
Yeah, that all sounds about right! I've not counted the teeth, but I know the top end isn't all that high, so it's hard to really get a decent pace going. I've got big knobbly tyres on as I cycle off road with a mate from time to time and I can't be arsed hanging tyres all the time. Could get some spare wheels I suppose! Meantime, at least using the wrong bike for road cycling will probably force me to work that bit harder.
 
Vonhelmet said:
Yeah, that all sounds about right! I've not counted the teeth, but I know the top end isn't all that high, so it's hard to really get a decent pace going. I've got big knobbly tyres on as I cycle off road with a mate from time to time and I can't be arsed hanging tyres all the time. Could get some spare wheels I suppose! Meantime, at least using the wrong bike for road cycling will probably force me to work that bit harder.
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But didn't you say you've got a 26 mile round commute or was that somebody else?
One things for sure, if you do that on a MTB at a decent speed you go like lightning on a road bike.

ANYWAY, been emailed today that the Trust is paying the bill to CycleScheme tomorrow so I should have my certificate for the weekend.
I'll probably be told there is a 3 month wait for the bike I want.
 
I took my chain off my bike today, and noticed that my bottom bracket doesn't spin that long (roughly up to 1 revolution). All I know about the bottom bracket is that it is an SRAM GXP.

Is this normal for bottom brackets? I've seen a few videos online where this happens, and people attribute it to drag due to seals. There's no grinding noise, just a slight rubbing noise before it stops. It doesn't cause any issues when peddling.

It's a bike I purchased last summer for just summer use, so I've not used it enough to know if it has always been like it.
 
I've noticed external BBs don't tend to spin that smoothly but I imagine it contributes very little resistance when pedalling, there's probably some technical explanation behind it.
 
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