Installation was better than most tubeless gravel tires. I used a compressor and they snapped into place on the first try. I added sealant through the valve and they are holding air well. I've been riding them on 50/50 gravel and pavement. I've been using between 32-38 psi . They roll very well on hardpack and pavement. These could be my go to for fast gravel / higher ratio of pavement. If riding a higher ratio of gravel (esp with known chunky gravel and/or washboard), I'd pick wider mtb tires to run more like 24 psi.
After years of riding on 25mm tires, I recently made the switch to the Continental Grand Prix 4 Season in 700x28, and the difference has been nothing short of transformative. Mounted on my Reynolds Strike carbon wheels, the fit was snug ' definitely a tight install ' but once seated, they've proven to be a stellar match for my Canyon Aeroad. Clearance was no issue, which was a pleasant surprise given the Aeroad's aggressive geometry.
Living and riding in Washington means dealing with a lot of small rocks, road debris, and unpredictable weather. These tires have handled it all with confidence. The puncture protection has been rock solid so far, and the added volume of the 28s has noticeably improved ride comfort without sacrificing speed. The increased air volume smooths out chip-seal roads and rough patches, making long rides less fatiguing.
Where the GP 4 Seasons really shine is in their all-weather performance. Traction and cornering are excellent ' even on cold, wet days when most tires start to feel sketchy. Whether I'm descending twisty roads or navigating damp, leaf-strewn shoulders, these tires inspire trust.
If you're looking for a durable, high-performance tire that can handle the grit and grime of real-world riding ' especially in the Pacific Northwest ' the GP 4 Season in 700x28 is a worthy upgrade. Just be prepared for a bit of a wrestling match during installation, especially on tighter carbon rims.
This is going to be a little different... I saw a video on youtube with Caden from Caden wheels explaining how he used sealant in TPU tubes with tubeless tires. Not TPU specific sealant, just tubeless sealant. He claimed the sealant lasted longer because there wasn't as much evaporation from inside the TPU tube and that the chances of a burp flat went dramatically down.
I decided to try it and here's the result so far. TPU tubes in this tire with sealant have been flat free through the Tour de Tucson and several hundred miles more. These tires roll and corner great and have been reliable. I won't know if I've gotten any punctures until I get one that's so big the sealant won't fill it or I take the tire off to replace it, but so far Caden has been right.
I've been a Continental Road Tire fan for over a decade now and these tires are no exception. They wear well and overall provide grip in all spring, summer and fall conditions. (No snow or Ice).
I'm riding 32mm AS version as tubeless setup with Orange Seal Endurance and I have them on 25mm internal Bontrager rims so they blow up to be about 34mm external. They provide a phenomenally comfortable feeling on the road. I run them at 46/48 psi with my 73kg weight. I've ridden these in lots of wet conditions, dry gravel, limestone trails and some really rough stuff that I wished I had even larger and they performed well beyond my expectations. I do inspect them after rides and pull out any items that seem to be stuck in them and then use some super glue to close up the small nicks and cuts. No plugs needed this past year so I'm counting my blessings there.
I currently have 4,158 miles on them (no joke) and I've just now had the rear tire not show the TWI (Tire Wear Indicators) disappear. I'm beyond impressed with these and will be retiring them this winter and replacing them with a brand new pair.
