GoldenG a écrit:OGI a écrit:PS : j'ai commandé des WTBi35 en 27,5
WTB
27.5" - i35mm_ 570g
29" - i35mm_612g
Jantes WTB i35 reçues
Alors pour le poids faut bien rajouter 30/40g pour chacune, 610 en 27.5 et 640 en 29.
Pas de prise de mm aux crampons, 75mm (comme pour les FlowEx) et 1mm pris au ballon avec 72mm (pour 71 sur les Flow).
Mais un pneu visuellement plus large et plus carré.
Ce qui veut dire que ces pneus (3.00 sur jantes 40mm ext) vont s'adapter à mon cadres 29 classique
Montage à blanc en chambre à air, possible qu'en Notube il y ait quelques millimètres sup' ... mais je n'y crois pas.
Un pneu qui supportera un peu mieux "la basse" pression avec un pneu moins saucissonné. (même si ça allait très bien sur les Flow avec une pression autour des ±1 bar, en dessous on talonne et tape la jante)
A voir si le volume d'air sup' permettra de descendre en pression sans pour autant talonner et mettre à mal la jante (Zozzo un avis ).
Je ne m'attends pas à une révolution par rapport aux FlowEx, j'espère être agréablement surpris
Jeff Jones y croit
Q: What size rims should I use on my bike?
A: We tend to recommend at least 45mm, but usually 50mm outside width rims for all of our bikes. On the Jones Plus, we pretty much always recommend at least a 50mm outside width rim. The reason behind the wide rims, even on the Jones 29 bikes, is that we have found that as we widen the spacing between the tire’s beads, it increases air volume, stabilizes the sidewalls by making them more vertical, and leads to fewer pinch flats. The increased air volume is just a factor of opening up the tire a bit more, but the other two points might need a little bit more explaining, and work together closely. As you bring a tire’s sidewalls closer to vertical and increase the width of the rim, you have a tire that’s held more in the rim, as opposed to acting like a balloon that bulges out around the rim. This allows us to use lower air pressure because the tire itself doesn’t need to be as stiff because there’s less tendency for the rim to sink into it (think of the tire as soft snow: a thin object sinks in, while a wide one doesn’t do so as easily) due partly to the rim’s larger surface area which needs to displace a lot more air in order to move down into the tire. The result of this is a tire that’s held more securely between the sidewalls of the rim, and a rim that’s less able to push into the air chamber of the tire. There’s more air, the rim displaces more air, and the tire needs less air to remain stable and not get squirmy. This just means that you can run lower air pressure, which allows your tires to soak up more bumps, making it possible for you to ride faster, more comfortably, and longer!