Yeah never forget the *KG* in W/KG!
Page may contain affiliate links. Please see terms for details.
mjd1988
Guru
Wonder how many watts you lose using the same turbo tyre for several thousand indoor miles even when it clearly is done and eventually pops the inner tube?
Asking for a friend
Edit; having removed the back wheel and seen what the rear derailleur looks like this may be a longer job than that
Asking for a friend
Edit; having removed the back wheel and seen what the rear derailleur looks like this may be a longer job than that
Last edited:
BurningLegs
Guru
Don’t bother with trainer tyres Michael Michael’s friend. Normal road tyres last plenty long enough in my experience, aren’t louder unless they have a tread pattern, and have the added benefit of being suitable for outdoor riding!
mjd1988
Guru
Cheers but he/she/they just use that bike on the trainer and he....I have already wrecked my thumbs getting it done. Good excuse to give the drivetrain a scrub tomorrow.
I'm glad I (touch wood) haven't had to do that outside of my garage, I am not good at it!
<Tommy>
Illegitimi non carborundum
- Location
- Camden, London
It was a topic of constant discussion on the bkool thread because we all basically had the same wheel on bkool pro turbo trainer. It was quite hard to completely nail down the exact science behind the optimal tyre and psi choice, because of the somewhat inconsistent quirks of the bkool pro. But I think general consensus was turbo tyres weren't as effective as normal tyres. And getting your tyre pressure up over 130psi minimum was a must. I don’t know if it’s as important on better wheel on turbo trainers though.
Brusgaard
Über Guru
- Location
- Skive, Denmark
Yes, high air pressure was essential for higher watts. Those blue Schwalbe Insider tyres were shite in that regard.
Wheel-on trainers have some sort of nylon/metal roller. For some reason, BKOOL decided to make the metal one on the Pro(s) ribbed, meaning it eats tyres for breakfast and leaves a nice track of rubberdust on/behind the trainer. I found the Vredestein Senso Extreme Weather to be the best, as they could go to 8.5bar and left almost no dust, and was also the one I used outdoors until worn out and then on the BKOOL Pro. Using the SI or other indoor tyre, you could get a different color of dust at the cost of 30-50 watts. 
However, I'm not sure an outdoor tyre would be optimal on trainers using a non-ribbed nylon roller?
Last edited:
mjd1988
Guru
I've been aiming for 100psi just to have an easy to remember variable for each time I calibrate the kickr snap
My setup is crap though, I don't think it is set up for a 9 speed hub for a start and with the last tyre there was always a weird thud noise every revolution of the tyre, I don't know if that was because the wheel was wonky or is if the inner tube was all messed up. With wheel on trainers its always a bit up in the air anyway, I had done the odd session on a wattbike at the gym to make sure power was in the right ballpark but haven't done that for ages now.
Randyberlin
Guru
- Location
- Sitka, Alaska
theboxers
TheBoxers on Cycle Sim sw
- Location
- OTC (on the couch)
SIL works in care and had the CV19 jab yesterday. Wonder what she's gonna make of this and will she tell her company so they can track her
BurningLegs
Guru
I also go for 100psi on my trainer (Tacx rather than Wahoo), and a regular tyre. I settled on that because it stops any slip and its appropriate for indoors and outdoors.
I don't bother calibrating now because I don't use the trainer to record power. Its super easy and low maintenance 🙂
I don't bother calibrating now because I don't use the trainer to record power. Its super easy and low maintenance 🙂
mjd1988
Guru
Speaking of calibrating anyone seen this?
https://zwiftinsider.com/shift-smart-trainer/
Adapter for peloton bikes to use zwift with accuracy of +/- 10%(!)
Doubt the market for people on peloton wanting to use zwift Is that big though
https://zwiftinsider.com/shift-smart-trainer/
Adapter for peloton bikes to use zwift with accuracy of +/- 10%(!)
Doubt the market for people on peloton wanting to use zwift Is that big though
I expect there's already an awful lot of people on zwift using trainers/power meters with similar or worse accuracy - and that's before you factor in calibration issues etc. Personally I think it's a worse problem than weight doping because it's completely hidden. But hey, it is what it is and it doesn't stop us enjoying ourselves does it?
Currently the only way around the problem is to get up to elite level where proper checks are put in place for everyone- and I have to accept that I probably wouldn't be able to live with those guys even on the dodgiest of bkool pros when it was on one of those days when it gave you super powers
<Tommy>
Illegitimi non carborundum
- Location
- Camden, London
I expect there's already an awful lot of people on zwift using trainers/power meters with similar or worse accuracy - and that's before you factor in calibration issues etc. Personally I think it's a worse problem than weight doping because it's completely hidden. But hey, it is what it is and it doesn't stop us enjoying ourselves does it?
Currently the only way around the problem is to get up to elite level where proper checks are put in place for everyone- and I have to accept that I probably wouldn't be able to live with those guys even on the dodgiest of bkool pros when it was on one of those days when it gave you super powers
I think weight doping winds me up more. But no doubt it’s a problem. I just try to keep telling myself the mantra: just concentrate on yourself and and you’re own numbers. Not always possible though is it...
I do find myself comparing my numbers to other neo users above other turbos. That’s not a dig at anyone else. It’s just that I know the numbers are most directly comparable to my own turbo. Where as other turbos sometimes have different numbers.
I thought certain turbos had been banned from certain races. Didn’t zwift do this themselves? Or maybe I’m imagining it... It would be useful to know what turbos people are on in a race I guess.
<Tommy>
Illegitimi non carborundum
- Location
- Camden, London
Yes, high air pressure was essential for higher watts. Those blue Schwalbe Insider tyres were shite in that regard.
However, I'm not sure an outdoor tyre would be optimal on trainers using a non-ribbed nylon roller?
I often thought that running a tubular tyre, where you could pump it up to 160psi maybe, would be the best option. But 🤷♂️. Definitely one of the plus points for direct drive trainers is you have more consistency in that regard.
Cycling Ireland organised a load of Zwift races at the start of lockdown and for the Cat A race they always asked the top 3 for power number verification. A mate who won got the full ZADA treatment and when it transpired he was on an Elite Muin B+ they told him that trainer wasn’t rated accurate enough and he wasnt to race again unless he dual recorded and could prove his numbers.
Ive given up getting too exercised about trainer accuracy. Not much any of us can do about it and we all just have to worry about our own races.
