A good balance between road and gravel, these tires roll well on asphalt, but a bit noisy. Dont expect long mileage, these tires wear pretty quickly. I run these tubeless with slime. On gravel they ride smooth with fair traction.
Ive been running the 40 mm with latex tubes inflated at 33 psi front, 35 psi rear on a mix of gravel and pavement (I weigh 160 pounds). They measure 40 mm wide mounted on HED Ardennes Plus rims. Theyre supple and about as fast on pavement as the Challenge Gravel Grinder Race 38s, but have much better grip and balance on loose gravel. They also feel fast on gravel, and are almost as secure on rough and rutted sections as the Panaracer Gravel King 43s running at about the same pressures. Compared to the Gravel Kings, they have a much lighter feel, partly because theyre each about 100 g lighter. I havent yet tested the Terra Speeds on a loose sandy surfaces or significant mud, so cant comment on performance in those conditions. I like the Terras enough that Ive just ordered a third to keep around as a spare.
Have these on my Boone on an Aeolus Pro 3 TLR wheelset. Mounting was pretty straightforward, I used Orange Endurance sealant. I had a slow leak in my front tire, but after a few rides the leak stopped. Ridden at 50psi, these are great on a well traveled dirt road, an old dirt and gravel road without smooth tracks or on pavement. I rode up a local mountain (in the Berkshires) after a rainstorm, so the dirt turned to mud but I didn't experience wheel slip or get stuck. I got the 35mm version, and thought initially I should have gone with the 40, but these have been fast, grippy, and great.
I mounted these up as a bigger option to run instead of my usual Pathfinder Pros in 38c. These measure 45mm wide on a 25 ird rim. I was quite happy with the feel, responsiveness, and overall confidence they give me without feeling their size or weight at all (not that it�s much different.) I also use them with a tire insert so I can comfortably ride them at 30-33psi. Great tire all around!
I bought these for the low rolling resistance and decent flat protection. The rolling resistance feels good, I have yet to experience any flats and the tread seems to hold well on loose over hard.
The sidewall in one of them has been weeping pretty hard. But that's not uncommon for tires.
