I am slowly building up a race gravel bike based on mtb xc frame so it can fit 2.25 tires.

I had an idea recently, what if you use a Cannondale lefty, but rigid. Would reduce the resistance quite a bit having only one leg. Unfortunately, there seem to be no mtb rigid lefty from Cannondale.

I found this bad boy
https://www.aliexpress.com/item/1005008869260998.html?spm=a2g0o.productlist.main.1.61251f68DaDFuL&algo_pvid=804d8e0e-3aea-4840-b6cc-94a89a55e3fc&pdp_ext_f=%7B%22order%22%3A%225%22%2C%22eval%22%3A%221%22%2C%22fromPage%22%3A%22search%22%7D&utparam-url=scene%3Asearch%7Cquery_from%3A%7Cx_object_id%3A1005008869260998%7C_p_origin_prod%3A

Although i have seen none of the reviews, zero builds with this on google. Absolutely no information.  What do you think of this? Bigrock frames have some good reputation out there.

Thanks

i say go for it

It seems quite heavy compared to a normal carbon fork.  You would probably be better just getting a lightweight suspension fork with only a few cm of travel.  Or a suspension stem. 

Quote from: pmark on November 12, 2025, 03:13:49 PM
It seems quite heavy compared to a normal carbon fork.  You would probably be better just getting a lightweight suspension fork with only a few cm of travel.  Or a suspension stem.

It is heavier, yes. Although resistance reduction dues look like tempted trait. 98% of the time gravel races have flats where im from, so weight is less of an issue)