Are Wide Tires Slow? Wabi Thunder 28mm tires tested 

I ride Conti GP5000s with TPU tubes on Elite Drive 50D wheelset on a Cervelo Caledonia. I switch between 28 mm and 32 mm tires often. I honestly don't notice the difference in speed. I ride a 35 km route (about 1 hour total time) and I am within +/- 30 seconds on my top times. The biggest differences are caused by the wind or how I feel that day (i.e. if I had a HIIT workout the day before), or traffic or weather. There is no way you can tell the speed difference. I prefer 32 mm - better cornering, better braking, I ride with more confidence (especially going downhill at > 90 kph) and it's better on rougher tarmac. Now those parameters - I can feel the difference Dedicating a 10 minute video and claiming that 28 mm tires are faster is just being dishonest to your viewers.

Very well thought out and presented. No surprise. As an adjunct, I recently switched for 25mm to 28mm on my TCR. I was amazed at how much better it felt instantly. More cushy, more sure-footed. I could not notice any decline in acceleration either. Stay safe.

65psi is too high for the 32s at your weight. I'm 100kg and regularly ride tires like that at 55psi. Once you drop a little bit below 60 pretty much every road imperfection is gone on 32mm. You lose less than half a watt efficiency dropping below 4 bar like that, really worth it the speed difference is not noticeable. The only time you really notice it is climbing above a 6% grade, but that is going to suck on single speed anyway so might as well. Like 55-61 is the sweet spot on all of those 32mm All Weather tires.

Hey did you spray your bikes yourself? Really like the finish on them. I'm currently retrofitting an old 70's road bike into a single speed bike and I've found some of your videos helpful, thank you for that.

Do you use any online tire pressure calculators (Silca etc.) or just go with your gut?

I was always a bit doubtful about 32s, but would you go from 28s to 25s?

what do you eat on long rides like 15+ mil+es?+

I knew it !! Thanks

I've got 25mm on front 28mm on the back. I'm 59kg though if that makes a difference. But I like my tires pumped to about 90psi...perhaps against all reason and studies but I dislike the soft spongy feel at lower psi, especially in corners.