![]() Inevitably, there's a tubeless-compatible, disc brake version. ![]() In the last few years Fulcrum has spun up three other versions of the Speed 40. They spin up effortlessly, handle well on windy days and weigh just 1,400g a pair. The Fulcrum Speed 40C wheels offer buttery smooth ceramic bearings, stable rims and brilliant braking thanks to a what Fulcrum calls AC3 - All Conditions Carbon Control. Nevertheless, Fulcrum says "It shall be the end user’s sole and full responsibility to choose - on a case by case basis – an adequate and correct rim-tire-pressure combination, as well as to conduct all verifications necessary to ascertain the correctness and safety of such combination." Gulp.īuy if: You want very sensibly priced disc-brake wheels for the road. At the skinny end your maximum tyre pressure for a tubeless set-up is 7 bar/105psi and 8.5 bar/120psi with tubes, while if your frame can take a whopping 64mm tyre you can run them tubeless at up to 2.4 bar/36psi and with a tube up to 2.9bar/43psi. You're no longer told which tyres you can use, but directed to a compatibility table that indicates the tyre pressure range you should use for a particular combination of rim and tyre width.įor the Racing 6 DB with its 20mm rim, for example, you can run tyres between 25mm and 64mm wide. Like the new Racing 5 DB and Racing 4 DB, the Racing 6 DB wheels incorporate 2Way-Fit, which is Fulcrum's way of saying that they'll work with both regular clincher tyres and tubes, and with tubeless and tubeless-ready tyres.įulcrum used to be super-cautious about which tyres you should use with 2Way-Fit wheels, restricting you to nine models of Schwalbe tyre, and saying " Any other type of Tubeless and Tubeless Ready tire is forbidden." However, the latest version of their guide to 2Way-Fit is rather more liberal, if still quite stern. If you think that sounds like a gravel bike rim, you're not far wrong, as Fulcrum says these wheels are for use "training or on road rides with a gravel bike". ![]() The disc-brake version of the Racing 6 has a claimed weight of 1,780g a pair, with new rims that are 20mm wide internally and 24mm deep. Riders who are doing a lot of out of the saddle, high-intensity training, or riders who regularly race on Zwift should look for a direct drive trainer instead.Fulcrum launched three new disc-braked wheels in 2021, of which this is the entry-level model. This ideal rider would also primarily do steady workouts that don’t involve out of the saddle sprinting. That person also already owns a power meter and does not use wheelset from Zipp. They want the most hassle-free process of putting their bikes on a trainer. Given the response from Zipp, I am unable to recommend the Rollr trainer at this time.įor the right rider, the Rollr could still be an option. However, my limited testing is likely not going to be representative of long term use nor of use by riders who are much heavier than me. With that said, in my testing time with the Roller, I did not experience any ill effects on my bike or front wheel. It doesn't make me feel any better about the situation that Wahoo refused to divulge which wheel brands they used for testing and Zipp's response clearly rules them out as one of those brands. We are working with other wheel manufacturers to certify their wheels with the ROLLR since Zipp has taken this position and we are sharing our research with them.”Īfter talking to Wahoo, Enve, and Zipp as well as spending quite a bit of time riding different bikes and wheels on the Rollr, I’m honestly left concerned. ![]() When asked for comment on this statement from Zipp, Wahoo’s Data Science team acknowledged they are now working with brands to certify different wheels on the Rollr trainer: “Wahoo has tested and analyzed several wheels and found the stresses all within acceptable levels always similar to or lower than stresses observed during outdoor riding. Any damage caused by such use will not be covered under Zipp’s warranty policy.” Zipp's Official Statment - ” Zipp wheels are not intended to be used on trainers that attach to the front rim or tire of the bike while the rear of the bike remains unsecured. This was due to the forces produced by riding a front-wheel clamping trainer being "much different than when riding on the road, where the loads are applied differently and distributed more evenly around the wheel due to it spinning." He informed me that "The engineers at Zipp have determined that using trainers that attach to the front rim or tire of the bike while the rear of the bike remains unsecured can cause significant flexing outside of normal intended use." I spoke to Michael Zellmann, Global Road Communication Manager at SRAM. When they replied later on their outlook was significantly less optimistic than both Wahoo and Enve. UPDATE: At the time of original publication SRAM (parent company of Zipp) had not yet gotten back to me about the Rollrs long-term effect on its wheels.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |