Isaac’s Joule has been around for a while now, it was one of the first of the new generation of full carbon monocoque time trial machines. Since it’s launch the Joule has spawned a mini range with first the Joule Aerotic and now the Aerotic Pro. For 2009 the original Joule frameset has beent re-designed in the wind-tunnel (and given a new name, the Efficiency) and there are various tweaks to the Aerotic. All of Isaac’s bikes get a new resin mix (whatever carbon weave they are made from) which, say Isaac improves impact resistance across the entire range. Top model, the Aerotic Pro, is basically a 2009 bike anyway and represents something of a departure for Isaac in the methods used to design it..
Up until now Isaac have designed their bikes using a mixture of computational fluid dynamics (CFD) to come up with a design and then tested and tweaked in the wind tunnel – the same approach Trek take. For 2009 though they have done things differently. The Joule Aerotic Pro was designed purely using CFD while the Efficiencey – the latest incarnation of Isaac’s original Joule frameset design, is a bike designed in the wind-tunnel. Interestingly, slightly bulbous head tube apart they are quite different looking bikes. 
For 2009 the Joule Aerotic Pro is suppled with three seat clamp units giving a choice of positions and an XXS size has been added to the range. Frame, fork, headset, and clamps will cost £1,998. Claimed frame weight for the Aerotic Pro is 1380g for the small. 
Sitting just below the Aerotic Pro, the Joule Aerotic gets a removable seat post for 2009 (a refinement aimed particularly at triathletes who travel with their bikes and find it tricky fitting machines with one-piece integrated seatposts into conventional bike boxes and bags). A simplifed materials spec over the Aerotiic Pro helps keep the cost in check – but both Aerotic modela are made from Ultra high modulus reinforced carbon 440 Gpa. Claimed wait for the Aerotic is 1450g for the medium and the and the 09 frame and fork package will set you back £1,599. 
The Efficiency is an evolution of Isaac’s first Joule frameset and the emphasis here is on a high strength to weight ratio: claimed weight for the medium is 1250g making it much the lightest of Isaac’s aero bike range. Continuous developments over the last four seasons have included materials revisions, a new fork, internal cabling – and a revised down tube section to further improve aerodynamic performance. Apart from the bulbous headtube it is certainly a much sleeker looking machines than either of the Aerotics. That said, all of Isaac’s usual touches are in place: an Isaac monocoque fork wotj dual diameter steerer, internal cable routing, and an FSA orbit-carbon asymmetrical integrated headset. For 09 the Efficiency frame kit can be yours for £1,299. Coming soon… more TT bikes and TT trends More Isaac pics
Isaac Carbon
Isaac’s 2009 TT bike range
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@SVXY Rule 66 of the highway code says you can ride two abreast but to also 'be considerate of the needs of other road users when riding in groups.' It does not say you can ride three or four abreast which would not be considerate of the needs of other road users. As the highway code is used by prosecution lawyers as evidence to convict in Road Traffic Act offences cases you certainly could therefore be prosecuted and convicted for careless cycling if cycling three or four abreast
@SVXY This is a curious tactic - rebutting your own argument with your very next sentence.
Affordable? Starting at £6K? You 'having a larf?
@SVXY Ah, so it *is* the "flood the zone with shit" argumentation technique then? Or perhaps ... you are genuinely unclear about the difference between the Highway code and the law (and perhaps the difference between cyclists, drivers and indeed horse riders? And rusty on safe practice? As mdavidford notes you appear to be confusing rule with Rule 66 (for cyclists, which doesn't say anything about not riding x abreast) with Rule 53 (for horse riders which gives guidance not to more than double up - I don't think this is a direct summary of any law since "should" not "must"). Charitably I'm going with "*i* know what it says!" which as I noted many of people feel they do. Anyway away with you, I feel you've had your fill of attention for today.
Road tax was abolished in 1937 by Winston Churchill because, as he said, "road tax makes motorists believe they are the moral owners of our roads." He got that right.
@SVXY None of the magistrates who sentenced him said the CPS should have charged him with dangerous driving. Why should they? He was not speeding, he was not on his phone and he was not drunk or under the influence of drugs either
@SVXY The court does not decide on whether someone was driving carelessly or dangerously, they can only decide on the guilt or otherwise of the defendant on the charge the CPS decides to lay against them. The CPS is notorious for preferring to charge careless rather than dangerous because it's an easier win; this results in entirely unjust sentences such as this one.
@Rendel Harris Wearing sandals may be fine if cycling on tracks over fields or in a quiet residential street with a 20 or 30mph limit. It is not sensible cycling on a 60mph main road
@chrisonabike maybe, but things that used to be banter & jokes in the 1960s/1970s have (thankfully) become socially unacceptable , and this is mostly because enough people spoke up about it. We even managed to make drink-driving a lot less acceptable, by the same means.
@Rendel Harris Yes, he was driving at 55mph in a 60mph road. The court verdict was he was not driving dangerously but carelessly eg he should have had his visor down to keep out the sun so he could monitor the road ahead.