This is because “the aerodynamic benefit is dramatic”, and almost always enough to overcome the difference in mass. While the Emonda SLR is still Trek’s lightest road bike platform by around 400g, Roessingh says, “from our perspective, Madone is almost always the fastest bike for any type of race situation, independent of terrain.” Trek claims to have cut 300g from the weight of complete bikes. That translates into complete bike weights from 7.1kg, for a size 54cm bike built with Shimano Dura-Ace Di2 R9270, or 7.4kg for a 56cm bike with SRAM Red eTap AXS. In terms of frameset weights, Jordan Roessingh, Trek’s director of road bikes, says the new Madone SLR is “just shy of 1000g for the frame and just over 400g for the fork”. The new Madone SLR is also claimed to be 300g lighter for a complete bike. Trekĭavies stresses, though, “you get those gains no matter how fast you’re riding.” Even at 35kph, Davies claims you’ll still see a 59-second improvement, and at 25kph the improvement is calculated to be 58 seconds. Trek says the new Madone SLR will save a rider 60 seconds per hour. In wattage terms, Davies says the new Madone SLR and its rider are claimed to be 19 watts more aerodynamically efficient at 45kph. “A ride that would previously have taken you an hour, will now only take you 59 minutes.” “Overall, the new Madone SLR is around 60 seconds per hour faster, including the rider,” says John Davies, an aerodynamicist at Trek. IsoFlow is claimed to offer the same comfort as the previous IsoSpeed decoupler on its stiffest setting. Naturally, Trek believes IsoFlow combines the best of all possible worlds, being lighter and more aerodynamic than IsoSpeed, but not compromising on comfort. Trek also acknowledged its pro riders questioned the performance benefits of the system, and whether those outweighed any added weight and complexity. While IsoFlow lacks the adjustability of the IsoSpeed system, Trek says most riders treat IsoSpeed as a ‘set and forget’ system – setting it to a level of desired compliance and then leaving it that way. IsoFlow is said to accelerate airflow through the hole and reduce the effect of the low pressure wake behind the rider. This change was said to be a result of feedback from its sponsored professional riders, such as Mads Pedersen and Ellen Van Dijk of WorldTour team, Trek-Segafredo, who simply requested the new Madone be “faster and lighter, as always”. This is said to reduce the effect of the trailing low pressure zone behind the bike and rider, reducing your overall drag. IsoFlow is claimed to improve the aerodynamic performance of the frame due to an acceleration of airflow through the hole as you ride. The IsoFlow system is claimed to improve aerodynamic performance and save weight. It is also said to improve the aerodynamic performance of the frame by “around 3 watts” and save weight. Trek claims IsoFlow allows the new Madone SLR to match the compliance of the previous IsoSpeed system on its stiffest setting. This had been present on the platform since it went all in on aero with the Madone 9 Series in 2015. The kite-shaped hole in the seat tube, which Trek calls ‘IsoFlow’, replaces the IsoSpeed ‘decoupler’ system. ![]() Please let me know if anyone has any other suggestions or things to check first.IsoFlow The 2023 Trek Madone SLR is claimed to be the "lightest and fastest Madone Disc ever". I guess I could go a to bike shop and have them run a diagnostic if it happens again. I'm not sure that this was the issue, and the battery could have certainly dropped down ages ago. I ordered the Ritchey mount to avoid the battery dropping down again. The battery is set in the seat post with some packing foam. I plugged it into the e-Tube software and everything was recognized (the B-Junction didn't show up, but I don't think that it would anyway. I also noticed that unplugging a single shifter or derailleur doesn't stop the other one from functioning. When I got home, I unplugged and replugged everything, including the wires at the B-Junction. ![]() The bike rode fine for the next 14 miles. I checked the battery light, and it's solid green. After about 1 min, the shifters sprang back to life. None of these made any difference.Įventually, I just gave up and got back on the bike, resigned to riding without shifting. Then I unplugged and replugged the wires into the rear derailleur, front derailleur, and junction-A box, and I checked the wires at the shifters. I unplugged it and plugged it back in, but there was still no response. ![]() I flipped the bike over and after some shaking, got the battery back out. I pulled out my seat post and found that the battery had slipped down into the seat tube. Pressing the button on the Junction A box did not activate the light. I was 10 miles into a ride on a hot day, and all of a sudden it simply stopped responding. I have Ultegra 6870 Di2 with an internal battery. I was riding yesterday afternoon, and my shifters suddenly stopped responding.
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