I have Thule bars and one Thule 517 Peloton fork mount and one Yakima 2000 Viper fork mount the Yakima Viper is better built.
Now if anyone has a Thule 517 Peloton fork mount tray and that plastic ratchet broke and will not clamp I fixed mine and use a Yakima Universal Lockable Skewer so for $20 you can fix it and it's better than it was.
If interested in the fix link here with pictures Thule 517 Peloton clamp fix