Wow, now that’s a rabbit hole I have to go down. Also, unfortunate that it’s happening with a “top of the line” $1200 trainer. Thanks for the info though, actually somewhat relieved the Assiomas aren’t the issue. Though they are cheaper to replace than the trainer.
Is there any way to use these with mtb pedals without having to butcher your shoes yet? I know they are working on a mtb specific pedal but I’m not sure how long it will be until they are available.
Also has anyone had a ptoblem with the bigger q factor of the shimano version?
Is your left/right balance nice and stable throughout your ride - if so then its unlikely to be your assiomas drifting as that would mean two independant PMs drifting by the same amount.
If your left/right balance gets more unbalanced throughout the ride then it is most likely that one of your pedals is faulty.
50/50 avg for the ride, and just a quick look at the Garmin chart it looks pretty even throughout. I don’t have the DCR analysis tool so can’t dive too deep, but on the surface it looks fine. And after reading through the Kickr thread, my guess is that it’s the problem.
Entirely depends on your setup, and it’s probably one of those things that you won’t know until you try it unless you have the same setup as someone who has already done it successfully. I run M-Force 4 pedal bodies on the Assioma spindles (non-Shimano) and didn’t have to modify my shoes at all (Sidi Dominators, size 39).
Not sure if you’ve looked at the thread specific to the hack yet (you probably have, but I linked it just in case), but I’m pretty sure there are a few others who haven’t had to modify their shoes, and also a couple I think that have tried the new Shimano spindles with different pedal bodies.
Thanks! I’m a bit scared to go out and buy stuff when I don’t know if it will work. I was looking at he shi version but I guess you get even higher q factor if you go shi and then add mtb pedals on. The other option is garmin rally that’s designed to swap between pedal bodies but they are so expensive
Hmm. My Kickr started doing this last week and based on feeling and HR I also recorded my ride with Assiomas too. Usually they have been ±1% but now Assiomas are reading about 10-20W more than given target W. So based on this somehow Kickr wattages are suddenly higher than the reading on workout. This caused few bailouts last week and railed off the training block as I was worried being too fatigued etc. Now started to use powermatch with Assiomas and power targets seems to be on line.
Totally get that! The Garmin Rally pedals weren’t out yet when I did the Assioma hack, so my options were really limited. I wanted to go with pedals for ease of using 1 power meter across multiple bikes and being able to travel with them. FWIW, I have been very happy with my setup with no complaints. The wider Q factor of the Shimano spindles may or may not be an issue for you. Some people care a lot about Q factor and really notice changes while others don’t. One of the drawbacks I’ve heard about the Garmin Rally pedals is the stack height. They’re thick pedals, and some people were concerned about rock strikes. I think they’re probably worth considering though, and the thread here on them has lots of good information on them from users. The Assiomas with the hack are probably a bit cheaper, but the hack does void the warranty whereas you get warranty coverage with the Garmins, so there is that to consider.
I would love to go down the assioma route as it’s $900 vs $1799 for garmin. I’ve had knee surgeries though so would need to test the q factor first
Hi,
You might be able to answer your own question regarding the Q-factor. If you’ve had a bike fit and have had the lateral positioning of your cleats adjusted to suit you, then you already have the basis for understanding your needs. This assumes the pedals are going on the same bike that you were fitted for and nothing else has changed.
If you know that your cleats are outboard, bringing your feet inboard then a wider Q factor is probably not going to be for you. However, if your cleats are inboard pushing your feet out, or you’ve washers between your pedals and cranks or pedal axle extenders or longer axle pedals currently, then these could be the ideal pedal for you.
I think it’s unfair of reviewers to focus on the Q factor and label it as a problem particularly when much of the original Speedplay hype was based on the variety of axle lengths. If it’s the right length for you it’s the right length.
HTH
Scott
My cleats are in the middle of my shoe width wise. I’m not labelling it a problem but it very well could be considering I have had 13 knee surgeries including a full replacement.
They’re definitely chunky. I had the Assiomas also and they’ve worked fine but I didnt want to do the hack and ended up getting the rally pedals at REI 20% off. They are hefty but outside I’m mostly doing gravel so that’s fine. And Q factor is not a big deal for me. I was hoping Assiomas would release an spd version.
They are supposed to be soon
Garmin Connect
Exactly same thing with me. LR power is 55/45 and overall power is 5 to 10% below my Kickr Core and a couple of other PMs.
Just like you, Favero look at my calibrations and sent me new right sided pedal (high shipping costs).
Disappointing as I had heard the brand were very accurate. Not so much in my case, so far anyway. Customer support very responsive and helpful however.
Bloody hell Shane, I was about to go to bed and now I feel that I need to respond. 
I agree that a different axle length to the norm needs addressing within reviews.
The original Assioma forces everyone into a narrower q-factor, is that a problem? No. It’s not necessarily about a bike fit change, it’s about the bike fit for that individual and whether it’s an appropriate axle length. If the user already has the cleats inboard and is using washers or extenders to push their pedals out it may well be a good option.
I responded to a question where it had been asked if anybody had a problem with the bigger Q factor. I’m a size 8 shoe but boy do these size 5’s give me a problem.
Given a clean sheet of paper, it’d be nice if any company chose to offer pedal axles in different lengths.
Let’s hope that a solid SPD-SL option does arrive. Just to be clear I’ll be using your reviews, like always, to inform me.
Cheers Scott
Just to chime in re q-factor - I’m less concerned with potential bike fit issues but would be worried about pedal strikes with spd-sl bodies on the assioma-shi on a road bike.
I have assioma shi in mtb pedals on my gravel bike and I actually find it more comfortable. Now I feel like my road bike (normal shimano ultegra pedals) is too narrow 
. I checked with my bike fitter who is also a physio before I purchased them and he indeed said a lot of women would actually find them fine, if not more comfortable, due to the different (wider) shape of the female pelvis.
Quick update just to confirm that FA support is very quick and helpful. Very impressed with them.