Need input on frame geomtry

[tuxbailey]

I am considering a MTB frame but I worry that it is too small for me.

Currently, I ride a 17.5" (med) Trek Cobia with the following geometry:

https://tuxbailey.zenfolio.com/img/s/v-10/p3983729022.jpg

The one that I thinking is 16.5" (sm) with the following geometry:

https://tuxbailey.zenfolio.com/img/s/v-10/p3983729023.jpg

The 17.5" one fits quite well for me and although the second one is sized 16.5", the overall dimension seems to match the 15.5" from Trek, hence I don't think it would fit me well. i am about 5'9" with 32 in seam.

Thanks in advance for any input.

[robt57]

for me, no less than 1" longer TT on my MTB VS Road, FWIW.

[tuxbailey]

for me, no less than 1" longer TT on my MTB VS Road, FWIW.

So for you, ETT is 1" or more longer for MTB over Road?

[colker]

I am considering a MTB frame but I worry that it is too small for me.

Currently, I ride a 17.5" (med) Trek Cobia with the following geometry:

https://tuxbailey.zenfolio.com/img/s/v-10/p3983729022.jpg

The one that I thinking is 16.5" (sm) with the following geometry:

https://tuxbailey.zenfolio.com/img/s/v-10/p3983729023.jpg

The 17.5" one fits quite well for me and although the second one is sized 16.5", the overall dimension seems to match the 15.5" from Trek, hence I don't think it would fit me well. i am about 5'9" with 32 in seam.

Thanks in advance for any input.

MTB new school geo has longer frint centers and top tubes. Built to be ridden w/ much shorter stems and wider bars. Go by the height size fit of the manufacturer.

[tuxbailey]

MTB new school geo has longer frint centers and top tubes. Built to be ridden w/ much shorter stems and wider bars. Go by the height size fit of the manufacturer.

Yeah, MTB geometry is very confusing between manufacturers.

[NHAero]

The 16.5 has a steeper STA while both have a similar HTA, so I wonder if the saddle is located in the same position relative to the Bb, will the reach be the same?

I am considering a MTB frame but I worry that it is too small for me.

Currently, I ride a 17.5" (med) Trek Cobia with the following geometry:

https://tuxbailey.zenfolio.com/img/s/v-10/p3983729022.jpg

The one that I thinking is 16.5" (sm) with the following geometry:

https://tuxbailey.zenfolio.com/img/s/v-10/p3983729023.jpg

The 17.5" one fits quite well for me and although the second one is sized 16.5", the overall dimension seems to match the 15.5" from Trek, hence I don't think it would fit me well. i am about 5'9" with 32 in seam.

Thanks in advance for any input.

[Hilltopperny]

I find mountain bike sizing to be all over the place for me. I find that I can fit multiple different sizes comfortably and I am the same height and inseam. I have owned and ridden 16.5, 17.5, 18.5 and 19" Trek mountain bike and enjoyed them all. The 16.5 and 17.5" were my favorite though.