greatwhite

If you are happy with the ride and feel of a 23 tyre, stick with it. at 100kg, you should be fine. I ride 23 contis and at the moment am over 100kg . I would stay clear of 20mm tyres through. I will say that generally, continetal tyre are quite prone to getting side wall cuts and this, despite the addition of their gatorskin walls etc. Used to happen every season to me (my season opening jinx): get new training tyre (conti ultra 2000, I think) and would slash one in the 1st few days, and my race tyres (gp4000) I would wreck one in the 1st race on those tyre, there after it it wasn't too bad.

EXCELLENT! Now I know who to 'sliipstream'

Same shaft and bigger flanges than std shimano hubs - so why not (don't know how the guts will handle the knocks though)

Sounds like you were ripped of for the bearings - were they supplied by the powertap agent or di you buy them from SKF or the like?

Don't know if Coolheat have any. I suspect the demand is really small - South Africans are generally pretty poor at making themselves and the road ahead of them visible in low light conditions. Bring one in from Germany - seem to be cheapest. The DH-3N80 which I am interested in will set you back over R1k at the current exchange rate, Shimano make a few cheaper units too as do Sram. greatwhite2009-03-03 06:47:41

Time to resurect this thread, the days are getting shorter - JB any more wheels built with such hubs and new experiences? Any one else?

Yep, an opinion about almost everything .....almost like HR..... 11.15 post per day incl Xmas and New Year......

I have had many 140mm stems and I can assure you they were never custom. I can also tell you there are a few 150mm stems available too. As for the seatpost - plenty of long MTB posts about which fit the bill. I ride a 58cm scott, am 1.95m tall and have no spacers under the stem (in fact I have a very low profile headset too). As a rule, a smaller frame is better because: 1. it is lighter 2. will flex less 3. is more nimble Lance is a bit of a funny guy though - he shunned the slopping top tube although logically it was always the right way to go - even Trek knew this and implemented it when he left. If he shunned the logical frame, why worry too much about the size - maybe he really is trying to prove its not about the bike.

Psuedoephadrine is common in many medications. Ephadrine not so much, but hardly uncommon. Ignorance is no excuse, but it is a mission to make sure you avoid all the banned items. Also, many meds are still in your system long after the illness is gone, so racing is possible. Thing that annoys me is this is the easy stuff to bust folks for - the fancy stuff with masking agents etc is a lot more difficult and as a result costly, but it is also the stuff that you know the guys are cheats when tested positive.

You guys should be contacting the agent at least about this. get it in writing there in nothing wrong with the cracking sounds. otherwise, it fails outside warranty but the problem started when new and you loose out. My guess is the agent will want to see the bike themselves and investigate

Dude, I've just emailed calabash - if there is any spare space, Noeleen and I are there. Also asked Eldron to get accom for us to. I'll take the 4x4, so if you need some extra stuff carted, let me know (eg Booze - so you only have to do the short loop..... LOL)

Bikerboy - Which Scale are you looking for Carbon Or Aluminium? Both awesome frames. The carbon is 0.5kg lighter, but the ali will handle rock impacts and falls a bit better - which is why I have and ali scale frame (that and the price tag of the carbon frame)

The wheel is carrying part of the truck, sure, but when wheel and truck part ways the wheel is 40kg (as it was before it parted from the truck) and the rest of the truck still has a mass of 2460kg. Momentum is a function of the mass. i.e. no change As for the reduction in downward force (weight if you prefer), this will cause the tyre to bounce up (but not a great deal I suspect) as the strain energy is released from the elastic components of the wheel, but not forward i.e. 90? the original force. (remember equal and opposite reaction) The above has got me to thinking of another possibility (again a stretch): If the wheel bounced up and something rigid on the truck struck it, it could act like a ball getting hit by a bat.

It can accelerate if stored energy is released. No additional energy is added. Wrong! The stored enegry will gradually be 'eroded' by losses (friction with air and ground) and by change in potential energy (going up or down hill) but it can only accelarate if energy is added.greatwhite2008-11-17 09:11:28

Energy is the confusion here. If no additional Force is added to the wheel' date=' then it cannot accelerate. Energy is a another matter. You can add energy ie heat, that will not result in acceleration. So you need to define what energy and where it is coming from. the quantity that has the most direct bearing on this discussion is Force, which is not necessarily energy but it could be the result of energy, ie the the tyre heats up and the tyre ruptures at a point where the stored energy release is converted to a force which propels the wheel.[/quote'] Now you are getting picky - correct in so far as the force being the main method for adding energy, but the question still remains: Can the wheel accelarate if no additional energy is added? (Y/N)

OK Guys... Bite size pieces..... 1. Can the wheel accelarate if no additional energy is added? (Y/N)

Whos maths book did you steal? Try some easier calculation 1st: 1 Taxi + 4 wheels = Happy JB 1 Taxi + 3 wheels = Nervous JB