You'd be hard pressed to find a fast-rolling, 40mm, tubeless gravel tire with an equal or greater competence and value then the Terra Speed. The 320 thread casing yields a wonderfully supple riding, while the soft rubber compound has tenacious grip on gravel and pavement. This is NOT the tire if you ride lots of harsh, sharp-edged rocky single track or to bang down stream beds at race pace. I easily ride through that stuff, but I slow down enough to avoid big hits.The one caveat to my value statement is based on being able to usually find this tire on sale, IE, under $50. At full list price, I might consider other tires with similar attributes. It's no surprise that the wonderfully sticky black chili rubber compound wears quickly on the rear tire if you ride much ... MoreYou'd be hard pressed to find a fast-rolling, 40mm, tubeless gravel tire with an equal or greater competence and value then the Terra Speed. The 320 thread casing yields a wonderfully supple riding, while the soft rubber compound has tenacious grip on gravel and pavement. This is NOT the tire if you ride lots of harsh, sharp-edged rocky single track or to bang down stream beds at race pace. I easily ride through that stuff, but I slow down enough to avoid big hits.The one caveat to my value statement is based on being able to usually find this tire on sale, IE, under $50. At full list price, I might consider other tires with similar attributes. It's no surprise that the wonderfully sticky black chili rubber compound wears quickly on the rear tire if you ride much pavement. The other trait that is unavoidable in a light weight gravel tire, is that the casing is more vulnerable to punctures and/or tears. I've only had one flat (a nail) in thousands of miles, but I would not recommend this tire for desert areas prone to cactus needles and thorns. (such as southern Arizona)

I thought I'd try Continental's gravel bike tires since I have had really good luck with their road and mountain bike tires. Terra Speed Pro tires were priced lower than comparable tires, and pretty light as well. I've got a few hundred miles on these now, and have these insights. #1- They measure slightly small in width; 40mm tires are 1.5 inches. Typically, tires run larger than the advertised size in my experience. #2 - Despite being tubeless ready, I could not get these to seat when I first mounted them. I had to use them with tubes for a month or so to form them to the rims. Second try, they sealed easily with Stan's sealant. They ride just fine, both on gravel or pavement. I would go with 42 or 45mm for rocky riding conditions, as the extra girth really helps ... MoreI thought I'd try Continental's gravel bike tires since I have had really good luck with their road and mountain bike tires. Terra Speed Pro tires were priced lower than comparable tires, and pretty light as well. I've got a few hundred miles on these now, and have these insights. #1- They measure slightly small in width; 40mm tires are 1.5 inches. Typically, tires run larger than the advertised size in my experience. #2 - Despite being tubeless ready, I could not get these to seat when I first mounted them. I had to use them with tubes for a month or so to form them to the rims. Second try, they sealed easily with Stan's sealant. They ride just fine, both on gravel or pavement. I would go with 42 or 45mm for rocky riding conditions, as the extra girth really helps with comfort and avoiding bottoming out when running low pressure. Overall, seem to be well made tires with usual Continental quality.

Great tyres. Used (so far) in dry conditions in the UK North Downs. Rough rocky, flint, smooth grit, and v loose gravel single track. Off camber ruts and tree roots galore. No punctures or slashes. Better than the WTB Resolutes these replaced.Grip has been excellent - very confidence inspiring. And fast rolling for sure on the road and off. They fly along.Will probably struggle when it gets muddy - but I didn’t buy these for the mud. Based on how good the ‘Terra speeds’ are, I’ll look at the ‘Trails’ for when it gets muddy in the winter.