I bought these to fit to my Specialized Diverge gravel bike which I use as a touring and bikepacking rig. I was planning a ride from home in Devon to Sheffield in South Yorkshire to visit friends so I wanted something that rolled well and would cope well with the wide variety of broken tarmac that serves as the UK road network. These tyres in 35c have been fantastic, they setup tubeless really easily, roll well and have loads of grip both in the wet and in the dry. In use I've found them to be nearly as fast as my 28c GP5000S TR that I run on my race bike but with all that bump absorbing magic from the 35c size. I'm really made up with them, as and when I wear them out I'm pretty certain I'll be shopping for another pair.

I bought 2 of these about a month ago Great tires. Quick and grippy. A few days ago after my ride, I gave the bike a quick clean, I was just checking the tires and noticed on the front wheel that the seam was coming apart. ( I must of got a bad one). Initially, I was puzzled thinking these are new tires under a month old. After a lot of thought I emailed Sigma and explained what has happened. I also sent a picture. This was Sunday, the next day they responded, without any fuss and asked me to post the tire and they would ship a new one out. As this was the holiday period and Tuesday was New Year's Eve, I would be without a bike for at least 10 days. so I decided to phone them and ask if I could bring the wheel to the Oakham Branch and if they could change it for me (as it was a tubeless tire)? The lady on the phone was extremely pleasant and understanding. She agreed for me to come and have the tire removed and a new one put on. I got there Tuesday morning and within 45 minutes all done. AAAAAAAA+ Alround