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Angelica T.
This says it is not for larger seat posts, does Quadratec have one available for larger seat posts?
Unfortunately not of our own. It appears that Yakima Tube top adapters large molded collars may be a bit more likely to accept larger stem bike applications but Yakima does not state a specific size. See this model for example. Yakima Tube Top Adapter Bar. Thanks for your inquiry.
Amos C.
Weight capacity? My ebikes are about 51 pounds, will it work with them?
The maximum weight for the adapter is 35 lbs, so use with Electric bikes is not suggested. Thanks for your inquiry.
Ryan N.
What is it made from: aluminum, iron, plastic...?
The Quadratec y-frame adapter is made from steel.
Seth G.
What is the minimum and maximum range from seat to handlebar for this adapter?
The center bar measures approximately 24-3/8" extended and 16-1/4" collapsed. When measuring from the inside of the hooks, the extended length is 31" and the collapsed is 22-7/8".