Darrell Wesh Posted May 19, 2020 Share Posted May 19, 2020 (edited) 3 hours ago, Elliott Reitz said: It would be cool if anyone would actually test their wheel torque. How? 1. Get a hanging scale, eg: https://www.ebay.com/itm/500kg-1100-LBS-Digital-Hanging-Scale-Heavy-Industrial-Crane-Scale-W-LCD-SCREEN/201359235679?hash=item2ee1f21a5f:g:cE4AAOSwdzxdl-eu 2. tie it to both foot plates and a parked vehicle. 3. use a pair of crow-bars to pry down on the front of the foot plates 4. Observe max static force on the scale. 5. Convert the force from lbs to motor torque in ft-lbs by proportioning it to the wheel radius. For example, if its a 19" wheel, the radius is 9.5". So multiply the force by (12/9.5) to get ft-lbs. In real world usage it wouldn’t matter. It takes technique to bring out torque, to tap into more potential torque then a straight lean, whether from a standstill or a rolling start. A standing straight lean would either faceplant you or leave you in the dust from someone technical. @houseofjob has been preaching about technique for a while Edited May 19, 2020 by Darrell Wesh 3 Quote Link to comment Share on other sites More sharing options...
Popular Post xorbe Posted May 19, 2020 Popular Post Share Posted May 19, 2020 It's very easy to overlean the MTen3. Fun to ride but clearly it's not super powerful. It does however give you what it's got without making you beg for it, which is probably what gives the illusion of extra torque. 4 Quote Link to comment Share on other sites More sharing options...
houseofjob Posted May 19, 2020 Share Posted May 19, 2020 (edited) 1 hour ago, Darrell Wesh said: In real world usage it wouldn’t matter. It takes technique to bring out torque, to tap into more potential torque then a straight lean, whether from a standstill or a rolling start. A standing straight lean would either faceplant you or leave you in the dust from someone technical. @houseofjob has been preaching about technique for a while This torque argument is funny Most riders don't realize the "standard", Frankenstein-planted-feet-then-lean-forward doesn't tap into anywhere near the max torque of a wheel, as your body weight is primarily down your heels, which is a brake, hence the need for something different in technique. The whole pad-up-tug-and-superman fad going around seems to be guys seeking to cheat this, but comes at a price in safety because you still have no back-leaning leverage/stability from bumps and other unexpected falling type scenarios. Edited May 19, 2020 by houseofjob 3 Quote Link to comment Share on other sites More sharing options...
Elliott Reitz Posted May 19, 2020 Share Posted May 19, 2020 5 hours ago, xorbe said: But that completely misses measuring torque at anything above 0 kph. 0 to 3 mph is where I most want torque. Also, there are major difference in "mode" of "hard/medium/soft" among wheels. And my old e+ seems pretty torque-y compared to the MSX. 1 Quote Link to comment Share on other sites More sharing options...
mrelwood Posted May 20, 2020 Share Posted May 20, 2020 57 minutes ago, Elliott Reitz said: And my old e+ seems pretty torque-y compared to the MSX. Torque is a different measure than the required amount of effort. Quote Link to comment Share on other sites More sharing options...
Elliott Reitz Posted June 1, 2020 Share Posted June 1, 2020 On 5/19/2020 at 8:07 PM, mrelwood said: Torque is a different measure than the required amount of effort. Exactly why I posted above... this: It would be cool if anyone would actually test their wheel torque. How? Get a hanging scale, eg: https://www.ebay.com/itm/500kg-1100-LBS-Digital-Hanging-Scale-Heavy-Industrial-Crane-Scale-W-LCD-SCREEN/201359235679?hash=item2ee1f21a5f:g:cE4AAOSwdzxdl-eu tie it to both foot plates and a parked vehicle. use a pair of crow-bars to pry down on the front of the foot plates Observe max static force on the scale. Convert the force from lbs to motor torque in ft-lbs by proportioning it to the wheel radius. For example, if its a 19" wheel, the radius is 9.5". So multiply the force by (12/9.5) to get ft-lbs. Otherwise, nobody can truly tell because the command authority needed interacts with riding style as well as power-pads, heel-grab, etc. And then there are different power ratings etc. People couldn't even tell torque diff between 84V and 100V MSX... it was a long thread that was never definitively answered. Here we are again. Since I don't want to risk popping any FETS in either of my wheels I will defer to the opinions here without any real facts on display. Quote Link to comment Share on other sites More sharing options...
Darrell Wesh Posted June 1, 2020 Share Posted June 1, 2020 On 5/19/2020 at 7:08 PM, Elliott Reitz said: 0 to 3 mph is where I most want torque. Also, there are major difference in "mode" of "hard/medium/soft" among wheels. And my old e+ seems pretty torque-y compared to the MSX. Technique can get you that torque. Almost done with my video on this pivotal phase of acceleration. 1 Quote Link to comment Share on other sites More sharing options...
petaluma Posted June 2, 2020 Share Posted June 2, 2020 Maybe slightly off topic but why is there not third party dyno testing of these wheels? Quick search online and there seem to be a few DIY builds being done with Arduinos. Cant be any harder to build a dyno for the EUC than to change its tire. Maybe its the cost vs a new wheel dilemma. I'd throw a few bucks at a gofundme to see accurate info. Anybody else? 1 Quote Link to comment Share on other sites More sharing options...
mike_bike_kite Posted June 2, 2020 Share Posted June 2, 2020 6 hours ago, petaluma said: Maybe slightly off topic but why is there not third party dyno testing of these wheels? Quick search online and there seem to be a few DIY builds being done with Arduinos. Cant be any harder to build a dyno for the EUC than to change its tire. Maybe its the cost vs a new wheel dilemma. I'd throw a few bucks at a gofundme to see accurate info. Anybody else? It could also estimate range for different weight riders, speed cut offs and battery throttling percentage. With a little extra work it could also give a figure for comfort. If you didn't mind risking damaging the wheel then you could have an additional test for waterproofing. Quote Link to comment Share on other sites More sharing options...
Elliott Reitz Posted June 6, 2020 Share Posted June 6, 2020 On 6/1/2020 at 8:53 PM, petaluma said: Maybe slightly off topic but why is there not third party dyno testing of these wheels? Quick search online and there seem to be a few DIY builds being done with Arduinos. Cant be any harder to build a dyno for the EUC than to change its tire. Maybe its the cost vs a new wheel dilemma. I'd throw a few bucks at a gofundme to see accurate info. Anybody else? Thank you. This is same as my concept using a spring scale to measure 0mph torque. And yea, its the new wheel dilemma or I would have done the spring-scale-test. Quote Link to comment Share on other sites More sharing options...
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