Safe to use a 350mm road seatpost on my MTB

[stephenmarklay]

It not as high as the min insertion mark. If the min insertion is 2 inches there is about that much again inserted.

Frame is steel and post is aluminum.

[gdw]

It should be if it isn't an ultralight model.

[cogclog]

I would only use a high quality post like a Thompson in this case. In my bike shop experience I have seen too many "tall" posts bend over time and few that have sheared off just from the weight of the rider. Too much leverage, not worth the risk IMO.


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[macaroon]

Absolutely fine to use. Although the minimum insertion mark will be more than two inches.

Try to make sure the bottom of the seatpost is at a minimum, 10mm below the bottom of the top tube/seat tube weld.