I've been riding these tires on the gravel for two years now in 35s, which I chose mainly because I was used to riding cyclocross tires 31-33. The tires have seen a lot of abuse including long gravel rides such as the Gorge Gravel Grinder and they're not showing much wear yet. They've proven to be a great balance of road efficiency and gravel traction (there's always compromises, right?). I'm going to try the 40s on this year's Gorge Gravel Grinder, giving up, perhaps, a little on the pavement for a little more comfort on the long gravel stretches.
I bought these tires for my new bike to do gravel rides, and I must say that they are working as I had hoped. The first time I used them I was glad I had chosen these tires, since there are many to choose from. They ride smoothly and have plenty of grip on the roads.
I found this tire to puncture easily and then not seal well with Stan's. I also had it delaminate completely near the bead rendering the tire worthless. I likely didn't have 500 miles on the tire when it failed. I'm glad I bought these on sale as they aren't worth full price.
The Flintridge Pro fits the fast rolling great traction recipe that mixed gravel riding requires. They are a full 40c in width on my rims and I am stoked on their traction, cornering and low rolling resistance getting to and from the gravel. 40c is the way to go!
I do mostly road with a little gravel endurance riding. I'm 250 lbs and am not up to riding 200 mile on a 100psi 25mm tire. The K1152 flintridge pro lets me ride at 65 to 80 psi. I didn't have any flats in 3000mi and it rides fast for a biger tire.
I picked these up about a month ago because I was looking for a durable, lower weight 40c gravel racing tire without giving up traction. These were 490g each (on my scale) and I set them up tubeless on 21mm internal wheels. I expected them to stretch and increase in width, but they seem to be a true 40c. No issues so far with about 300 miles on them. I've tried 20-35psi and I've settled around 27.
Rode and finished the 2016 DK200 on these 40mm gems with no flats on a standard tube set up. 30-50 PSI running pressures with wider tread offers more comfort for long gravel endurance rides on my Warbird. Definitely a contender and viable set of skins for any serious gravel adventure or premier race event.
Like everyone, I've been searching for a tire with a balance of low rolling resistance and reliable traction. The Flintridge Pro is the best I've used yet. Smooth quiet roller on pavement with quality cornering and climbing on loose gravel - it's true to its 40mm width, so it offers good volume for rough roadsoccasional trail sections. And it's tubeless! My first attempts to seat the tire were unsuccessful, so I brought them inside to warm upsoften a bit (outside temp was 50ish). Once warmed to room temp, they inflatedseated on first attempt. Running front and rear. Stoked.
Super hard to get to inflate tubeless. Once that was done (after lots of dinking around with tubes, etc.), both tires had pronounced wobbles. Massaged the tires, inflated and deflated the tires, reset the beads of both tires, tried high pressure with air compressor, etc. None of it worked with either tire. Spent three hours dinking with these crappy tires. Had to send them back. Now I know why they were on sale.