Absolutely love the Sigeyi on my Pivot Les, would definitely recommend. Gets a good review with GPLama as well.
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My main thought for wanting a PM on the mtb is for pacing long gravel climbs in endurance events. Besides that I’m not sure how useful it would be
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Nice on the Epic Evo, I was lucky as well getting the size/model when i bought mine back in Sept. So far happy with it with an upgrade here and there!
+1 on the Sigeyi PM, saw GPLama’s review and bit the bullet. No complaints so far but like some I’m using the PM just to pace myself for the long climbs. I’ve dabbled in some smaller XC winter races, but not useful yet as I have the winter weight to lose and build my base fitness back up.
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Quarq, it does exactly what it says on the tin.
Is there any difference between the power you are pedaling on the trainer than on the mtb ( with power meter). Reading some stuff that there is a 20% difference between the power you put on a race bike vs MTB
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Smashed the battery cap on my Quarq, it bent slightly but survived.
Smashed the battery cap on my P2M NGeco, repair was pretty expensive so chose to pay and have it replaced by a P2M NG, havent smashed that battery cap yet, it is also flatter.
P2M has more clearance vs frame, could be of interest if you are considering frame with BB92.
I don’t bother with a power meter on the trainer, I just use the trainer meter.
However I’m about 5% higher outside on my bike with a power meter. I put that down to measuring at the crank on my bike rather than at the hub on the trainer which will include a few watts of drivetrain losses.
- That sounds rather excessive to me, but it’s hard to say without more specific info.
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That seems more specific to your trainer/power meter combo than a MTB vs trainer/road bike thing.
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+1 to Kevin’s comment about pacing and post ride analysis.
And also +1(+2 or 3) to the Sigeyi. I’ve got two and they’ve been flawless.
I’d be careful going with a 4iii in terms of clearance. i.e. make absolutely certain the doofer will clear the chainstay before you spend the money. I made the mistake twice (well one and a half times) before going Sigeyi.
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So I can use the powerzones based on the training that I do in TR?
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As long as your power meters are reading close to the same.
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I use a left arm Stages which hasn’t missed a beat. Having said that I can definitely hold higher power for longer riding gravel roads on the MTB than I can a trainer on erg mode (which seems to grind me into the metaphorical dirt). Certainly not 20% different but significantly so.
From a usefulness perspective, definitely in doing outside workouts on gravel roads, but I also use it to keep an eye on IF for marathon races and I watch it on those punchy climbs to make sure I’m not exploding whole boxes of matches to help with pacing
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I put a P2M NGeco on my FS trail bike last month and it’s working great so far just like the one I’ve had on my road bike for the last 2 years.
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Overall happy with mine. I think it has been on the bike for over 2 years now but did have to get a replacement. I did a short video on my experience.
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I have a dual sided power metre on my road bike and have the singke sided on the MTB and it works just fine. I know that I only have very little power difference L or R so happy with single sided in the future.
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@dirtyzilla yes on the pacing aspect. Will hold off for a few though as I am sure you can relate but since using a PM for a while now on my Tarmac and Neo Bike I know relatively close what 300 watts, etc feels like. Pacing for me is not too much of a problem usually but I don’t race either nor do TR outdoor workouts anymore.
And yes I was lucky being online 2 weeks ago and it showed up and bought within 5 minutes.
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I don’t think this is true: if you are on a budget, one-sided power meters offer great value. On a secondary bike they are great, too. You can use them for training, keeping track of TSS, pacing, etc.
I have put a one-sided power meter on my mountain bike since I have a Quarq on my road bike. That is despite my issues with them in the past: on my previous road bike I only one a 4iiii left-sided power meter. This threw my leg balance out of whack. My body learnt that it could “increase the power output by 2 W” if my left leg provided just 1 W extra. Very efficient 
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You might have too much time on your hands 
I just look at the balance at the end of the ride 50%/50% so only need a single sided. Too much analysis = paralysis.
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Which is odd because it’s useless during a ride and should not be focused on. The only very rare exception would be if you have/had a single leg injury you were rehabbing and/ or one leg was significantly stronger.
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