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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@chrisonabike True, things went back to normal once the pandemic was over. In this case, however the problems are still ongoing, and aren't likely to be resolved in the near future. If anything, they're going to get worse. Food shortages are predicted because of the effect that the heatwave has had on crops. This is bound to push prices up. The Straits of Hormuz aren't likely to reopen anytime soon and the strategic oil reserves are running low. Russia is having to import petrol because its own refineries have been badly hit, so that's even more competition for an even more scarce resource. I think that more and more people are going to see cycling as a way of cutting household bills.
I think if "grown up" cyclists * are quibbling about ASLs we've very much missed the road safety point anyway. (Not to mention the wider "better transport choices" picture). ASLs are poor-to-useless "cycling infra", even for their design intent. If the idea is "for less confident cyclists" then a design that requires that you re-position in front of the motor traffic - waiting to accelerate - seems unhelpful. Of course they're only designed to help when traffic is stopped, and you can reach the front in time and if vehicles aren't already occupying them. As we're noting here drivers frequently ignore them - whether that be deliberate, a lack of road craft, because they were concentrating on following the vehicle in front, or because the paint has rubbed off. * Aside: shouldn't cycling also be safe and accessible for kids? Or should they only be allowed to do this when accompanied by sufficient qualified adults? Or be limited to parks and otherwise being driven around by their carers? Perhaps there is another way...?
Hi Bungle, I saw you follow-up comment. I can't imaging there's a tolerance of 4 seconds on camera enforced lights, seems an odd decision - an offence is committed if a vehicle starts crossing on a red, any tolerance is discretionary. There does seem to be some odd thinking about 'advanced stop lines' where the rules relating to them are identical to a regular stop line, as explained correctly elsewhere in the Highway Code. It does seem a regular offence. Where I live it doesn't help that some of them are very faint and disappear in rain.
@ktache Not sure he's totally ruled out of the worlds yet (though I think it would be best if he doesn't), normal recovery time is about eight weeks but surgery can halve that...depending on the nature of the break he could be just about fit to ride by the time of the elite men's race, but he'll have missed a lot of training. Hopefully his managers and team will persuade him to wait until Lombardia, if not just to knock it off for the rest of the year.
@Bungle_52 The Met told me a couple of years ago when rejecting a submission that they needed a clear three seconds of red visible before they would consider it for an RLJ prosecution. I pointed out to them that this meant that at 30 mph a driver could see a light change to red from 40 metres away and still get through without sanction, or 55 m if they accelerated to 40 as most do. They just replied "them's our rules..."
@Ben Graham I have just checked the footage from my report. The driver crosses the 1st stop line 4 seconds after the light turns red. All on camera from behind the vehicle. No further action. So I assume the margin is at least 4 seconds.
Oh, and active travel funding per head (in England at least) is laughable compared to other places. Plus it is delivered intermittently. It's more like a Blue Peter contest...
Yup, I see those opportunities being missed all the time in Edinburgh. When it gets really bad, dig it all up and put it back down again how it was. Contrast with what seems to happen in NL - when things are dug up the whole thing seems to get a "let's redo this according to the current standards" treatment. They even coordinate with the utilities, so that after a refurb the street isn't immediately dug up again because of leaking pipes / we suddenly realised the new estate being planned for round the corner will want broadband etc. Pros and cons of course - you may wait longer there for changes as smaller changes may be deferred until a major redo is due. (Though in the UK case you likely wouldn't get them at all...) It seems we "can't have nice things" in the UK in part because a) we have greater motor traffic speeds/volumes spead across "streets" / within urban areas b) the funding and organisational responsibility differs. Are we in the "Sam Vimes boots" territory (being too poor to afford better products which not only save money over time but actually work)? There is long term money pressure on LAs and it seems that due to poor construction and maintenance we have to regularly pour money into (pot-)holes in the road. And it seems there's no budget to check up on or enforce adequate standards from utilities work or even private building.
Shame about the world champs defence. Speedy recovery. https://www.theguardian.com/sport/2026/aug/30/tadej-pogacar-vuelta-a-espana-cycling-crash-hospital-stage-nine
I believe the accepted form for this kind of argument is "I know you are, you said you were, but what am I?".
