biceps wrote:
Wind tunnel testing is only the first stage to getting more aero (faster), but the AR is not a track bike but a road bike where things don't stay constant for long. Just look at F1 this year and McLaren, they know a thing or two about aerodynamics but it is what the drivers can do with the car on a track in race conditions that really counts. Their wind tunnel data not delivering the performance gains expected. Road bikes need to take corners, spring up climbs, descend like a comet while maintaining control etc etc. So what would be nice now is taking some semi pros and do testing with different bikes and power metres to gage the effort for those results. This would be solo efforts of a fixed course and in group race conditions. Maybe even put some clip-ons and get a do some short time trials using different bikes and testers, as I suspect a good percentage of people buying an aero bike are looking to save having to buy a full on TT bike. Then we can really understand if the Felt can delivers on what looks like a great bike.
Personally I would really like to understand if buying a Canyon SLX 7.0 Ultegra 11speed weighing 6.7kg is quicker, slower or similar than the new Felt AR 4 which weighs over a kilo more. Similar costs to buy the bikes but does a non-aero Pro level frame beat an aero bike (new Felt AR4) under road conditions. Will the aero compensate for the extra weight? Different question to what is the best aero road bike is, but surely the question is what the best road bike is. Hills exist, road surfaces vary and being able to sprint at the end of a race to win are all important aspects road bike need to deal with. I wonder what Felt would recommend to get their new AR4 down close to the UCI weight limit, even the AR2 would need to shed a bit of weight. Consumers’ need to know what they get for their hard earned money. I wish we could move away from theory and move more to real world tests as crude as they may seem.
You've just listed about 5 subjective metrics that can be debated endlessly. How could Felt possibly claim their bike is better in "group race conditions" than another? Shedding weight from an AR4? Wheels are certainly a way of doing so. Would a pair of R-sys wheels make the bike faster? That is difficult to say, it would depend on the conditions it was being used.
The bikes are real world tested, these are not first attempts that get released to the public, they are the 6th or 7th version of the tube shapes, there have been countless lay up revisions and the AR has been raced at the Cat 1,2 level in the USA since early July to aid the balance of performance and comfort requirements. If you wanted a lighter bike Felt also makes the F4 with Ultegra or the Z4 if you're looking for more compliance or F3x if you have a dirty mind or B12 if you wanted a TT/Tri option, or...
I think you're are actually suggesting a move toward theory and subjectivity and not analytic evaluations of the product.
-SD
https://www.kickstarter.com/...bike-for-the-new-era