I've been running these on my recumbent 559 under by Fatboys. I love them! They are about half the weight of the Hutchison tubes they replaced. The Race 650's are 26x1 and will work with 559's. I even had them a bit over inflated in the Fatboy's with no problems. At 75 grams these are very light tubes in comparison to the alternatives! You can't go lighter in this size for 559 at this price! The other advantage is they are available with 60mm presta valve stems for tall road rims. I don't know what else to say about the Continental Bicycle Tubes... they do a great job at low weight and moderate cost. I paid $7.50 at a local bike shop. Cheap tubes are in the $4 range, but are much heavier and I would have to use extenders to make them work on my bicycle. Definitely recommended.
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