Tell us your FTP 'differential' (indoor to outdoor)

My outdoors best (based on 57minutes) on a flat and a non technical course is the same as my best 20mins on the turbo this year.

I use the same FTP indoors and out but press roughly 5% over it on a short TT.

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285-290W feels like MLSS on the trainer. 295-300W feels like MLSS outside, same power source.

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I am at about 315 outside, and 290-300 indoors on the same TT bike, same power source (Assiomas).

I think cooling makes a difference but for me it’s also the inertia as when I have tested on a pelotón bike with my assiomas, I find it easier than on my Elite suito and it’s the same as by outdoor numbers. The peloton has a huge flywheel and it keeps momentum on the pedals. However on the suito, same TT bike as outdoors, my cadence always seems to drop below 90 and it’s a real effort to turn the pedals over, whereas outdoors , when I do the same threshold intervals , I pick up speed and the cadence naturally picks up to well over 90 and it just feels more sustainable.

I think with more practice I can adapt to the different feel and Intertia.

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We had really bad air quality from forest fires last August/September, and that forced me to ride inside. And then a couple times over the winter.

Kickr 2017 direct-drive and big chainring. About year ago started using standard/level mode. Indoor and outdoor efforts feel the same, and seeing similar power numbers for sprinting, and similar power:HR for threshold/sweet spot/tempo workouts. With Erg it feels a bit weird, similar but different to riding on flat roads, however indoor/outdoor sweet spot are the same. So I’m not really seeing much difference between indoors and outdoors.

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Indoor is lower, maybe 10 - 20 watts, but it doesn’t really matter as I do 95%+ of my structured training rides on the trainer - now a Stages SB20.