i just purchased a Giant Revolt ADV 3 - which comes specced with an FSA Omega, 32/48 - right now i can’t see myself changing the crankset and am looking for a non pedal based power option … i know there are similar threads but most relate to a shimano crank …
wondering if anyone had any ideas … i am not DEAD set against pedal options as i have garmin v3’s for my road bike but thought i’d ask the knowledgeable folks on here for any options they have found
I just don’t think there is any crank arm or spider based version compatible with that crank.
I checked 4iiii, Stages, Power2Max, Rotor and couldn’t find any for the Omega. There are a few for the upper end FSA, but nothing for that one. I didn’t check SRM, but doubt they have one for a that crank.
The only options I’ve seen for you are pedal or PowerTap hub/wheel build with the old G3 disc.
FSA changed to a removable spider when they came out with their later version. Sadly, the original, with a fixed spider, has no option.
Your best bet is a pedal.
I use a SRAM XX for my gravel bike. It’s 120/90, IIRC and I run 42/28 with Favero Assioma DUO pedals on that one. I looked at hubs in the past, but don’t like them.
One option, if you’re open to changing the crank, is to go for SRAM. You can change the spider to a MTB spider. I know someone who did that, with a Force BB30 crankset with a 104BCD spider and a road chainline. It’s a bit tricky though, as there are spider variances.
So I think bike has a GRX400 FD. GRX has a slightly wider chainline that the typical Shimano Road FD’s. So for new cranks the easiest way to go (for compatibility, not necessarily finding it in stock) is to get a GRX crankset and a stages PM. I know Power2Max sells a spider based PM with GRX spacing but with new crank arms and every thing that would probably run you $800 while the stages route would be more like $500.
I have seen some people getting the GRX FD’s to play nice with the standard road spacing by bottoming out the limit screws. So that route would open up a few more options for PM’s but you would probably have to go to 50/34 gearing.
You could also just go for the FSA powerbox. They come in for like 500€ including the cranks. Propably will fit the BB too. Although I am not sure what gearing it´ll allow.
P2M has a sale now, $620 + shipping (~$20) with chainrings. No tax for PMs from their USA site (probably included in the overall price).
It seems a decent price, after the tax and shipping from 2 different places, it’s probably closer to $100 difference. Total power vs single sided. I guess you could sell the left arm, with the stages, but eBay would probably charge more for listing it and resisting it and the seller fees.
You can’t really reuse the rings from the FSA Crank. You can find a FSA Mega Exo crankarm PM out there, but why bother - it’ll be $500 and you have a poor quality FSA crank.
I’m not that technical, but if that was the same crank as was on my AL Topstone, I couldn’t find any option. I had two 4iiii left crank (ultegra on the “good” bike, 105 on the winter bike), so for me the cheapest option was a GRX crank set, and move the 105. Only clearance issue I had was the bottle cage on the underside of the downtube, which I didn’t use too often anyway.
If I was starting from scratch I’d be very tempted by the new Garmin pedals (or be waiting to see if any other options come out).
tricked me.