|   road to mtb size conversions... HELP!!! | Mango Monkey
Nov 25, 2003 11:48 AM | | Hi all...
I ride a 57cm seat tube x 57cm top tube... road frame... (non compact)
What is the equivalent size in hard tail MTB frame ?
is that equivalent to a 17 inch... or 18 inch ? is that a medium ?
im confused... Im look at building my first MTB... i ride 4 times per week... 200 miles average per week... i want to change one of those rides to an MTB ride... just to brake up the road riding... Plus MTB is way fun and silly... :) So ... what size do i need ?
PS : im looking at the Jamis Komodo frame...
Thanks |
| re: road to mtb size conversions... HELP!!! | laffeaux
Nov 25, 2003 12:05 PM | | Frame size vary a lot between manufacturers, and by type of frame.
The Jamis is not a frame that I'd buy, as I prefer more cross-country oriented frames. However, looking at their spec charts I'd probably go with a 19" for me, and I ride about a 59cm c-t-c road frame (6'0" with 34.5" in-seam).
IMO, the top tube length is the most important measurement on a MTB. The 17" bike's top tube is too short for me - I'd need a super long stem to be comfortable.
Try both the 17" and 19" and see which is more comfortable to you. And when you try other manufacturers, realize that their 17" and 19" frames may not be the same size. |
| re: road to mtb size conversions... HELP!!! | Mango Monkey
Nov 25, 2003 1:04 PM | | Thanks...
i will keep that in mind, if i dont get the Jamis...
I really just want to build a Climbing bike...
I dont really care about going down hill too much... So light is important... not suspension... if i can build this bike to be close to 20 pounds even, i will be very happy....
thanks again... |
| Climbing bike? | laffeaux
Nov 25, 2003 4:25 PM | | From the specs on Jamis' web site, I'd not think that Komodo is a bike to buy if you're looking for a "climbing bike." The Komodo is a long travel hardtail with a fairly slack headtube angle (70 degrees), and a heavy duty frame. It sounds more like a freeride bike.
http://www.jamisbikes.com/bikes/03_2komodo.html
If you're looking to climb look for a steeper headtube angle, lighter frame, and a shorter travel bike (i.e. 80mm of travel). |
| Climbing bike? | Mango Monkey
Nov 25, 2003 7:50 PM | | i was not going to buy the bike...
i was going to buy the frame alone...
and make it totally rigid...
sorry i didnt say that part... just the frame...
what is a good climbing MTB frame then? please help the monkey...
thanks |
| re: road to mtb size conversions... HELP!!! | FM or MF
Nov 25, 2003 12:07 PM | | I used to work at a shop that did fit kits and custom frames. I mainly MTB but have road ridden a lot too.
The shop guys all agreed that we actually lied the same length TT and stem on both our road bike and MTB's- however this lended itself to a racy fit. For instance, I rode a 17" mtb with a 22" TT, and a 54.5cm square road bike, both with 130mm stems. I'm 5'-8". Since then I've moved to a slightly longer TT and shorter stem... |
| re: road to mtb size conversions... HELP!!! | Ricko
Nov 25, 2003 12:19 PM | | I'm 5'9" and ride a Med/18" mtn frame and a 56cm TT Road frame. The fit chart says I belong in a 54cm but I like to be more streched out on a roadie so I went with a 56.
What's your height and inseam? If you're in a 57cm road frame you might be leaning more towards a Lg in mtn frame.
Ricko (always glad to assist converting a road rider to dirt:) |
| re: road to mtb size conversions... HELP!!! | Mango Monkey
Nov 25, 2003 1:02 PM | | Thank you...
I guess i will look at the 17 inch and the 19 inch...
or at medium and large... hmmm... little comfused still... But now i see the range i am in...
thanks again... |
| impossible | lbc
Nov 25, 2003 9:05 PM | | Proper sizing will likely put you on an 18-19" mtb frame. That's a guess, though. I'm not familiar with the Komodo's dimensions, but would venture a guess that a 17" is too small. If we assume you can get a 23.5" top tube, I'd start with a 120mm stem and 175mm cranks, but that's a spitball. Stem rise and the use of riser/flat bars also have a tremendous effect on overall fit. Do your homework and make sure the rigid fork works with the bike's geometry, otherwise you may be looking at a ridiculously twitchy and unpleasant bike.
The key elements of your fit are based on the platform of a correctly sized frame. From there you'll be able to customize your ride. |
| impossible | Mango Monkey
Nov 26, 2003 2:11 PM | | Thank you very much...
i will look at the 18 and 19 inch MTB's...
thank you... |
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