Help with sizing

No one?

jwroubaix said:

Hi, I am a road biker who recently purchased a Trek 3700 mountain bike to ride around with my kids. I'm worried I got the wrong size. The guy that was helping didn't seem that knowledgable and though I looked better on the 21 inch bike compared to the 19. I just got the bike and when I stand over the center bar I hardly have any room between the bar and my crotch. Is this a problem? A 19 may be too small, Am I okay with the 21?

On a related note, I didn't get an owners manual, is this common or should I have received one?

Are you 6'3" tall?

6'0" tall?

5'10" tall?

5'8" tall?

5'5" tall?

5'3" tall?

Something in between?!?

I'm 6'1

jwroubaix said:

I'm 6'1

And, what is the size of your current Road bike?

How long is the top tube AND how long is the stem?

I think my road bike is a 54, but i'm not positive. It's been a few years.

If you are 6'-1" and were fitted for a 19-21" mountain bike, your road bike is probably not a 54cm.

Regarding your mountain bike size:
If you were properly fitted for a 21" and it feels comfortable to you while riding, then you really don't need much room between your crotch and the bar while standing. A bike is meant for riding, not standing over the top bar.

jwroubaix said:

I think my road bike is a 54, but i'm not positive. It's been a few years.

You need to buy a ruler ...

1.0 inch == 2.54cm

If the frame is steel, then give the c-c measurement. If it is alloy, give the c-t measurement.

If the frame has a sloping top tube, then figure out the measurement where the nexus for a virtual top tube measurement would be ...

Measure the top tube (c-c), too.

Measure your stem's length on BOTH your Road bike & you MTB.