FWIW ...
Yes ...
The arithmetic ($128.75) dictates that you do NOT return the bike ...
By my reckoning, the two, immediate options which are available to you are ...
- keep the frame
- buy-and-install a longer stem
- probably 110mm-to-120mm for someone who is your height if you are going to use the handelbars which are supplied with the bike
- ride it
- OR, immediately try to re-sell the bare frame/-set
- 4130 CroMoly TIG welded steel
- custom geometry
- 68mm English (BSC) Threaded Bottom Bracket Shell
- 1-1/8' Steer Tube
- Horizontal Track Dropouts
- 120mm Rear Spacing
- Accepts 700x35 tires
While you certainly have the option to ride the bike as received, I strongly recommend that you consider removing the crankset & BB (
if they are not installed, so much the better) and immediately re-sell it on eBay with a starting price of around $150+ plus shipping (
try to get a box from your LBS ... should be free).
BTW. Before you do
anything with the new bike, I think you should check the stem length on your 'old' MTB and then compare its top tube + stem length with the abbreviated 57.5cm top tube + 50mm stem on the new bike.
A 50mm stem is about as short as one can buy ...
If you feel that your old MTB is too small, then a 63cm total reach which is
probably at least
1cm shorter than your old MTB's combined virtual top tube + stem length is going to really seem to be too small ....
Think about it.
BTW. I think you need to try to get a a better understanding of frame sizing ...
While there are commonly accepted parameters which are frequently used as a starting point, frame sizing may be more of an art than a "science" ...
Regardless, you seem to be ignoring that the 58cm top tube is the starting point for a
Drop Bar bike ...
Consider that FLAT BAR bikes are spec'd with top tubes which are longer than DROP BAR bikes ... a large part of the reason is because there is ZERO forward reach on a Flat handlebar.
If you want to use the frame that is coming, you will probably want BOTH a longer stem AND a Drop handlebar (
42cm-or-wider).
FYI. There are numerous, used MTB frames which have a 60cm top tube on eBay for less than $!00 ... many will have vertical rear dropouts, but that is a minor issue which is readily resolved ...
et cetera ...
et cetera ...
et cetera.