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• #402
Mack hubs also great for a fixed wheelset, road superlight front with low flange rear (190g).
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• #403
I've been thinking about A23s on something light like the Mack hubs - with CX Rays, 32 or 28 rear and 28 or 24 front, and Velocity Veloplugs, I don't think you'd be that much over 1400g (unless the A23s are a lot heavier than claimed).
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• #404
I've been running a rear wheel with A23 rim for last 3-4 weeks with Vittoria Open Pave 24c tyres and you really can reduce the tyre pressure drastically.
On 23c and at 65kg you apparently can go as low as 65-70 PSI and inflating your tyres to anything like 'normal' pressure risks compressing rim so much you can lose spoke tension.
On normal rim at 100 PSI 24c tyre measured 24.2mm wall to wall, on A23 at 80 PSI (I'm over 90kg) over 26mm. Really really comfortable and noticeable improvement over my open pro wheel
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• #405
what are people's thoughts on American Classic road hubs? Seem very light and nice high flange should make for a stiff wheel on 32 spokes and some open pro/ambrosio's but never met anyone who's ran a set and can vouch for their performance v.s the price tag.
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• #406
I'm looking at starting hill climbing, would it be worth getting a light weight tubular front wheel. (can't afford a rear too yet) or would the money vs time difference be a shite ratio?
And while I'm asking about hill climbing, are. The bars better as high as possible so your stood up more so more body weight over the pedals and lungs more open, or is that another silly idea to be scrapped?
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• #407
what?
Generally climbing more hills or competing in timed hill climbs?
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• #408
Timed hill climb events
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• #409
ask BMMF - he knows all.
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• #410
I'm thinking of building a pair of lightweight do it all clinchers.. have seen some rather nice looking taiwanese hubs from eBay.
like these:http://www.ebay.co.uk/itm/8-sealed-bearing-277g-Super-light-sokin-Red-Road-Bike-Hubs-20-24-Shimano-/270842207954?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item3f0f741ed2#ht_5209wt_1163Chosen apparently make things for Halo and the like... Any opinions, and has anyone actually used them?
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• #411
Weight Weenies has a good wheel build thread if you've not already seen it. The various Taiwanese hubs crop up on there.
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• #412
@raleighracer - if you're 'looking at starting hillclimbing', I'd wait until autumn and enter some hillclimbs on whatever you're currently riding. Then reassess.
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• #413
I'm thinking of building a pair of lightweight do it all clinchers.. have seen some rather nice looking taiwanese hubs from eBay.
like these:http://www.ebay.co.uk/itm/8-sealed-bearing-277g-Super-light-sokin-Red-Road-Bike-Hubs-20-24-Shimano-/270842207954?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item3f0f741ed2#ht_5209wt_1163Chosen apparently make things for Halo and the like... Any opinions, and has anyone actually used them?
Didn't dammit build a pair of carbon rims on those hubs?
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• #414
@raleighracer - if you're 'looking at starting hillclimbing', I'd wait until autumn and enter some hillclimbs on whatever you're currently riding. Then reassess.
Yeah I will, but you know how it is 'this month I'd like to hill climb so need lightnes' last month I wanted to commute so got better lights and started looking at 23/25/28 puncture proof tyres.
Being indecisive, it doesn't help anyone........
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• #415
I've been running a rear wheel with A23 rim for last 3-4 weeks with Vittoria Open Pave 24c tyres and you really can reduce the tyre pressure drastically.
On 23c and at 65kg you apparently can go as low as 65-70 PSI and inflating your tyres to anything like 'normal' pressure risks compressing rim so much you can lose spoke tension.
On normal rim at 100 PSI 24c tyre measured 24.2mm wall to wall, on A23 at 80 PSI (I'm over 90kg) over 26mm. Really really comfortable and noticeable improvement over my open pro wheel
Great post. Repped.
I've been claiming this, in an armchair expert manner, for a while. Nice to see someone with actual experiance take the time to put some facts down.
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• #416
I've been running a rear wheel with A23 rim for last 3-4 weeks with Vittoria Open Pave 24c tyres and you really can reduce the tyre pressure drastically.
On 23c and at 65kg you apparently can go as low as 65-70 PSI and inflating your tyres to anything like 'normal' pressure risks compressing rim so much you can lose spoke tension.
On normal rim at 100 PSI 24c tyre measured 24.2mm wall to wall, on A23 at 80 PSI (I'm over 90kg) over 26mm. Really really comfortable and noticeable improvement over my open pro wheel
Sorry - can you explain this in an idiot dialect so I can understand?
I've always just shoved on 23mm tyres and inflated them as high as their rating allows (150psi for the panaracer at the front, 120psi for the tame gaterskin at the back). I'm 95kg. Am I risking some sort of Singular Event? Or is there something in your findings that'll make me go even faster?
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• #417
wider rims Garnett, wider rims.
Normal road wheel is about 19mm wide, whether the Velocity is 23mm wide.
I also experience exactly what adoubletap had when running 25c tyres on a 25mm wide rims.
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• #418
Sorry - can you explain this in an idiot dialect so I can understand?
I've always just shoved on 23mm tyres and inflated them as high as their rating allows (150psi for the panaracer at the front, 120psi for the tame gaterskin at the back). I'm 95kg. Am I risking some sort of Singular Event? Or is there something in your findings that'll make me go even faster?
Tyre presssure is related to rider weight, and tyre volume. The rating on the casing is just a guideline maximum. Unless you get your tyres custom made, and labeled, for you. Its wrong. By quite a lot.
increasing rim width, improves both tyre profile, and volume. this allows for less pressure. Which in turn gives more grip and comfort, with little rolling resistance penalty.
Punch your weight and tyre size into this, adjust your pressures accordingly, and try it.
http://www.dorkypantsr.us/bike-tire-pressure-calculator.html
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• #419
wider rims Garnett, wider rims.
Normal road wheel is about 19mm wide, whether the Velocity is 23mm wide.
I also experience exactly what adoubletap had when running 25c tyres on a 25mm wide rims.
I've only experianced it on off-road set-ups. I'm convinced its a notable factor for road riding too though.
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• #420
That calculator tells me 73 psi front and 113 rear.
That's for a 23, there was no option for a 22- which would make the pressure required higher?
Both tyres currently have 170 psi in, so I could do with taking a bit out according to those figures.
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• #421
Since riding with A23 rims I've also noticed I don't have to keep an eye on the pressure as much, not that I don't It's just I don't notice as much when it drops as I did with thinner rims.
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• #422
That calculator tells me 73 psi front and 113 rear.
That's for a 23, there was no option for a 22- which would make the pressure required higher?
Both tyres currently have 170 psi in, so I could do with taking a bit out according to those figures.
Thats because you're bike is edging into anti-matter mass territory.
Theres not much in 23-22mm, like less than 5 PSI.
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• #423
Meh. Pump to 100psi.. wait 3 months before adding more air.. realise you rode the Harp Hilly Hundred with 40psi in your front tyre.
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• #424
I just use the squishy rating. Press down with thumb, check that I can deflect the tyre a bit and ride off.
Just managed to fit 47c into my cross frame so may need to recalibrate my thumb -
• #425
So not the "use the floor pump until it's an effort, then twang the tire and if the ring is high enough and you're slightly scared to go near it, the pressure's nearly sufficient" technique.
Thanks for the dumbed down version, everyone. I'll try the calculator, but a couple of things bother me... the calculator doesn't allow for rim width. How do/should you adjust for different rims? And how should you decide on rim and tyre width combos?
Are there any implicttions for puncture resistence?
Sounds like a nice wheelset. Having 32 3x spokes on the back should make it easy to build a nice stiff wheel. Its the combination of light and stiff, that gives the 'fast' feeling IMHO. I'd be tempted to go 24 1x on the front. It looks really nice, and saves a little uneeded weight.
I used these PSR TB 2015 spokes for pillar on a lightish fixed wheelset. Built up into a stiff wheel quite easily (skinny spokes can wind up horribly). 275g for 64 (241g for 56).
http://www.bdopcycling.com/Pillar-Spokes.asp