I'm running 700x35c Kenda Happy Mediums and need some extra inner tubes. Since there's a width range on tubes, would you use a 23-35 or a 35-43? My guess is the 23-35 since it'll install easier and is less likely to pinch. Thoughts?
If you are using the backup tube it means you already have a flat. I would go with the 35-43's. They will be a bit heavier and take up more room in your saddlebag but since they are not stretching to their recommended max when installed you should have better flat protection.
IMHO -- either size will likely work well; but I would chose the the smaller because it is lighter (rotating weight does make a difference), and because it is easier to install. I would also suggest buying higher quality tubes from companies like Continental, Schwalbe, Michellin. Yes- they are all made in the far east, but these companies have stricter quality control, and I've had better experience with these brands over the years. Worth a few extra bucks.
Thanks for the advice, and I agree about tube quality from Conti etc. FYI, I easily installed 35c tires on a 29er MTB using the 35-43 width tube, but the rims are much wider (can take 29 x 2.2 tires). Weight issues aside, I'm thinking that because my gravel rig has narrower rims, the 23-35 tube would be best overall.
Yup - I agree with your choice. I've always found that tire width and design had more to do with avoiding flats. Tube choice, as long as you stick to quality brands and stayed within the suggested range, didn't make too much difference. The one exception would be latex tubes --- which I've found to reduce the risk of punctures, and improve performance. But they are expensive, and there aren't many (any?) quality choices available in sizes greater than 700x 28mm. But since we run lower pressure, tubeless is very attractive!
I've actually been curious why more people don't mention using latex tubes, Yes they are more expensive but relative to the weight savings and flat protection they should easily be worth it. I've been using the Challenge SL Latex 700x28/35 tubes in Challenge Gravel Grinders 700x38 for a while now and really like it. The tires are a bit bigger then what the tubes are rated at but I have no issues. I've used the same latex tubes with the Continental Cross Rides 700x42 without issue. The listed weights for a standard tube size 700x28-40 weights about 160grams, the Challenge latex are 60 grams I recall. Saving 100 grams of rotational weight for $15 extra does not seem to bad to me. They are harder to install though since they are so thin.
