Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Mountain Biking Mountain biking is one of the fastest growing sports in the world. Check out this forum to discuss the latest tips, tricks, gear and equipment in the world of mountain biking.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 02-16-05, 07:46 PM   #1
Grasschopper
He drop me
Thread Starter
 
Grasschopper's Avatar
 
Join Date: Jul 2004
Location: Central PA
Bikes: '03 Marin Mill Valley, '06 Cannondale Rush, '02 Eddy Merckx Corsa 0.1, '07 Bottecchia Euro Sprint Tour Comp Elite Pro 1000
Posts: 11,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Fitting a MTB...how do you do it?

Ok so How do you fit a MTB? I am a roadie and I know what I like there but I am unsure how to properly fit a MTB. I am 5'10" with a 31.75" inseam. Last MTB I had was a 2001 Giant XTC SE2 17" which I didn't ride and traded for a bike for my wife. Now I want a MTB again (read I shouldn't have traded the XTC but oh well). I think the XTC fit ok but I didn't ride it too much so I am not overly sure. My Marin Mill Valley is a 17.5" but it is a roadie. What size do I need? The top tube lengths seem WAY longer than roadie TT numbers so it is throwing me off a bit. So one of the bikes I am looking at is a Surly 1X1 but I dont' know weather to get a 16" or an 18". The TT of the 16" is 10mm shorter than my old XTC and the TT of the 18" is 10 mm longer.

Should I go with the 16" and a longer stem or the 18 and a shorter stem? Thoughts?
__________________
The views expressed by this poster do not reflect the views of BikeForums.net.
Grasschopper is offline   Reply With Quote
Old 02-16-05, 08:13 PM   #2
Killer B
THIS BIKE'S 4 U !!!!
 
Killer B's Avatar
 
Join Date: Sep 2004
Location: Western, NC .... (Pisgah, Bent Creek, DuPont)
Bikes: HARO Xtreme X2, K2 Lithium 3.0, K2 Beast, K2 Flyin' Monkey, DiamondBack Accent EX, DiamondBack Axis TR
Posts: 1,272
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
In a word... "Medium".....

Forget the cm thingy....
Killer B is offline   Reply With Quote
Old 02-16-05, 11:04 PM   #3
Peek the Geek
is slower than you
 
Peek the Geek's Avatar
 
Join Date: Jan 2005
Location: WI
Bikes: Gunnar Sport, Marin Pine Mountain, Gunnar Ruffian, Gunnar Roadie, BMC Fourstroke, Salsa Vaya
Posts: 1,486
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Grasschopper
The top tube lengths seem WAY longer than roadie TT numbers so it is throwing me off a bit.
Are you looking at the ACTUAL top tube lengths or the THEORETICAL top tube lengths? Since the TTs on mountain bikes are more sloped than on road bikes, they're going to be longer. When sizing, you want to compare theoretical top tube length, meaning the lenght of an imaginary line, parallel with the ground, from the center of the seatpost to the center of the head tube where it meets the top tube.
__________________
Proud supporter of the Chippewa Off-Road Bike Association (CORBA)
www.chippewaoffroad.org

Peek the Geek is offline   Reply With Quote
Old 02-17-05, 05:41 AM   #4
MichaelW
Senior Member
 
Join Date: Feb 2001
Location: England
Bikes:
Posts: 12,920
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Dont forget that drop bars add another 6-8" of extension to your reach beyond the stem. A cx style mtb is usually ridden with quite an aggresive position, comparable with the hoods of a road bike. Meaure up the reach to your hoods and compare.
MichaelW is offline   Reply With Quote
Old 02-17-05, 06:06 AM   #5
Grasschopper
He drop me
Thread Starter
 
Grasschopper's Avatar
 
Join Date: Jul 2004
Location: Central PA
Bikes: '03 Marin Mill Valley, '06 Cannondale Rush, '02 Eddy Merckx Corsa 0.1, '07 Bottecchia Euro Sprint Tour Comp Elite Pro 1000
Posts: 11,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Good point on the reach of road bike bars being part of the issue.

For the person that asked I am looking at TT lengths parallel to the ground, not the actual tube. In fact the slopped TT is shorter than the theoretical TT as the seat tube is slopped away from the head tube.
__________________
The views expressed by this poster do not reflect the views of BikeForums.net.
Grasschopper is offline   Reply With Quote
Old 02-17-05, 06:10 AM   #6
motorhommmer
Senior Member
 
Join Date: Oct 2004
Location: Dublin, Ireland
Bikes: Specialized Sirrus Sport, Specialized Stumpjumper Comp, Brompton, Trek 1500
Posts: 379
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The most important measurement is from the tip of your saddle to the handlebars. Standover height etc is irrelevant. Read peter Whites Article www.peterwhitecycles.com/fitting.htm.
This is the most important aspect. I have found this through bitter experience. Sheldon Browne also interestingly makes the same point.
Next then is riding style. More forward the bars more aggressive the riding style.

Enjoy
motorhommmer is offline   Reply With Quote
Old 02-17-05, 06:30 AM   #7
Grasschopper
He drop me
Thread Starter
 
Grasschopper's Avatar
 
Join Date: Jul 2004
Location: Central PA
Bikes: '03 Marin Mill Valley, '06 Cannondale Rush, '02 Eddy Merckx Corsa 0.1, '07 Bottecchia Euro Sprint Tour Comp Elite Pro 1000
Posts: 11,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yea I have this printed out but I thought it was related to road cycling. I guess I need to reread the article. Basically I need to decide before noon weather a 16" Surly 1X1 is the right size for me or if I would be better off with an 18". I can stand over either with no issue and we are talking frame set so I can put a setback seatpost and a longer stem on the short one if I have to but if I am putting a huge stem on and a setback post I think I am just making too many compromises. I wish anyone in my area stocked Surly. grr.
__________________
The views expressed by this poster do not reflect the views of BikeForums.net.
Grasschopper is offline   Reply With Quote
Old 02-20-05, 02:57 PM   #8
abramsgunner
Newbie
 
Join Date: Feb 2005
Bikes:
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Gotta test ride bikes from several manufacturers and see what feels right... then most likely, your first bike won't be right anyway... but you'll get a feeling for what works, and your second purchase will be more on target for your riding style. Stand-over IS important, unless you want to squash the jewels the first time you step off into a hole.. been there, done that
abramsgunner is offline   Reply With Quote
Old 02-20-05, 02:58 PM   #9
PWRDbyTRD
Toyota Racing Dev.
 
PWRDbyTRD's Avatar
 
Join Date: Oct 2004
Location: Knoxville, TN baby!
Bikes: 2004 Kona Hoss Dee-Lux
Posts: 3,339
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
jump on it...if you bash the boys...go smaller
PWRDbyTRD is offline   Reply With Quote
Old 02-20-05, 03:56 PM   #10
seely
The Rabbi
 
seely's Avatar
 
Join Date: Apr 2004
Bikes:
Posts: 5,085
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
As for Surly, they seem to use "old school" geometry... the top tube is shorter and doesn't slope as much as you see on the new frames out there.
seely is offline   Reply With Quote
Old 02-20-05, 06:13 PM   #11
Killer B
THIS BIKE'S 4 U !!!!
 
Killer B's Avatar
 
Join Date: Sep 2004
Location: Western, NC .... (Pisgah, Bent Creek, DuPont)
Bikes: HARO Xtreme X2, K2 Lithium 3.0, K2 Beast, K2 Flyin' Monkey, DiamondBack Accent EX, DiamondBack Axis TR
Posts: 1,272
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by PWRDbyTRD
jump on it...if you bash the boys...go smaller
Good One Man !!!!

The Dude's my height, and I can ride any Medium framed bike, hence the post from me earlier.... People are making this stuff too hard IMO.
Killer B is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 02:01 AM.