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 12-09-08, 09:36 AM   #1
mtbtrek
mtber
Thread Starter
 
mtbtrek's Avatar
 
Join Date: Jul 2008
Location: Earth
Bikes: really nice bike
Posts: 55
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Fork upgrade question

I have a 2006 trek 4900 with rockshox j1(80mm). if i were to uprade the fork how much travel could i get.
also how do i tell if is a threadless or not
mtbtrek is offline   Reply With Quote
Old 12-09-08, 11:10 AM   #2
sirtigersalot
Senior Member
 
Join Date: Aug 2007
Bikes:
Posts: 624
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
if you have 80mm i wouldn't go over 100mm
sirtigersalot is offline   Reply With Quote
Old 12-09-08, 11:17 AM   #3
mtnbiker66
Old School Rad
 
mtnbiker66's Avatar
 
Join Date: Sep 2004
Location: The old Mountains
Bikes: Blur LT
Posts: 8,212
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by sirtigersalot View Post
if you have 80mm i wouldn't go over 100mm
I would...........
__________________
Like a circus monkey on a stolen Harley......
mtnbiker66 is offline   Reply With Quote
Old 12-09-08, 11:35 AM   #4
sirtigersalot
Senior Member
 
Join Date: Aug 2007
Bikes:
Posts: 624
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
you could put a very long travel fork on it but the geometry is gonna get screwy, even a 100mm will change it but it won't be drastically diff, but w/e throw somthin long on there if u want
sirtigersalot is offline   Reply With Quote
Old 12-09-08, 11:37 AM   #5
rydaddy
Type 1 Racer
 
rydaddy's Avatar
 
Join Date: Apr 2006
Location: Davis, CA
Bikes: A dozen or so.
Posts: 2,579
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I haven't looked up the specs but I am sure it's threadless. Does your stem have 3 bolts, 2 side and 1 on top? That would be threadless.
rydaddy is offline   Reply With Quote
Old 12-09-08, 12:39 PM   #6
mtbtrek
mtber
Thread Starter
 
mtbtrek's Avatar
 
Join Date: Jul 2008
Location: Earth
Bikes: really nice bike
Posts: 55
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
yay my stem has 2 bolts on the side and 1 on the top
mtbtrek is offline   Reply With Quote
Old 12-09-08, 04:43 PM   #7
Metzinger
Primate
 
Metzinger's Avatar
 
Join Date: Jan 2006
Location: gone
Bikes: Concorde Columbus SL, Rocky Mountain Edge, Sparta stadfiets
Posts: 2,582
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yay indeed.
But make sure that new fork improves over the old in a meaningful way.
More travel does not mean better fork.
I'd rather have a predictable 10mm fork than a 100mm leaky piece of twisty junk.
Check the reviews.
Metzinger is offline   Reply With Quote
Old 12-09-08, 04:46 PM   #8
ca7erham
****** (can I say this?)
 
Join Date: Jun 2008
Location: CO
Bikes:
Posts: 1,900
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Dont get a dart. One of my spare rotors has been ruined by leaking oil from my old dart
ca7erham is offline   Reply With Quote
Old 12-09-08, 05:01 PM   #9
ed 
.
 
ed's Avatar
 
Join Date: Oct 2005
Location: The Summit of Lee
Bikes: Hecklah
Posts: 10,932
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ca7erham View Post
Dont get a dart. One of my spare rotors has been ruined by leaking oil from my old dart
Oily rotor + alcohol = good rotor.
ed is offline   Reply With Quote
Old 12-09-08, 05:20 PM   #10
ca7erham
****** (can I say this?)
 
Join Date: Jun 2008
Location: CO
Bikes:
Posts: 1,900
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Hmm, well then, I guess you should get a dart. I never read the end of that thread.
ca7erham is offline   Reply With Quote
Old 12-09-08, 09:09 PM   #11
mtbtrek
mtber
Thread Starter
 
mtbtrek's Avatar
 
Join Date: Jul 2008
Location: Earth
Bikes: really nice bike
Posts: 55
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
how about the rockshox recon 351 Coil
mtbtrek is offline   Reply With Quote
Old 12-09-08, 09:31 PM   #12
ed 
.
 
ed's Avatar
 
Join Date: Oct 2005
Location: The Summit of Lee
Bikes: Hecklah
Posts: 10,932
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Recon = good
ed is offline   Reply With Quote
Old 12-15-08, 07:22 AM   #13
mtbtrek
mtber
Thread Starter
 
mtbtrek's Avatar
 
Join Date: Jul 2008
Location: Earth
Bikes: really nice bike
Posts: 55
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
will the recon fit on my bike
mtbtrek is offline   Reply With Quote
Old 12-15-08, 07:24 AM   #14
ed 
.
 
ed's Avatar
 
Join Date: Oct 2005
Location: The Summit of Lee
Bikes: Hecklah
Posts: 10,932
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yes
ed is offline   Reply With Quote
Old 12-15-08, 07:40 AM   #15
z415
Senior Member
 
z415's Avatar
 
Join Date: Apr 2006
Location: Gainesville/Tampa, FL
Bikes: Trek 1000, two mtbs and working on a fixie for commuting.
Posts: 2,343
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Are you going to DIY? I recommend getting a shop to do it - it has a few steps.
z415 is offline   Reply With Quote
Old 12-15-08, 07:56 AM   #16
mtbtrek
mtber
Thread Starter
 
mtbtrek's Avatar
 
Join Date: Jul 2008
Location: Earth
Bikes: really nice bike
Posts: 55
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
what are the steps on replacing it
mtbtrek is offline   Reply With Quote
Old 12-15-08, 11:43 AM   #17
Fluxlo
Junior Member
 
Join Date: Dec 2008
Bikes:
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I would throw on a tora solo air or a reba. Both are good forks for the price and tunable. You can run 100mm travel without too much issue but there isn't a point to put more unless you're doing riding other than xc, in which case I would consider getting a different bike.

As far as installation, check out park tool's mechanics corner.
http://www.parktool.com/repair/readhowto.asp?id=111
Fluxlo is offline   Reply With Quote
Old 12-15-08, 12:24 PM   #18
Jameson
Senior Member
 
Jameson's Avatar
 
Join Date: Mar 2005
Bikes:
Posts: 335
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The steps are as follows. Remove bolts from stem. Remove topcap from headset. Pull out fork. Remove brake attatchment. Install headset race on new fork. Cut fork to proper length. Install new starnut into fork. Slide fork into headtube after installing bearings from headset. Tighten topcap and stem bolts. Attatch brake.
These steps are not exactly in order. Installing the race on the fork requires a specialty tool but I've done it twice using various methods. Same with the star nut. You risk damaging the race and setting the star nut wrong with the shadetree method. If your not confident, take it to a shop. They can also recommend a suitable fork.
Jameson is offline   Reply With Quote
Old 12-15-08, 12:57 PM   #19
ed 
.
 
ed's Avatar
 
Join Date: Oct 2005
Location: The Summit of Lee
Bikes: Hecklah
Posts: 10,932
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Jameson View Post
The steps are as follows. Remove bolts from stem. Remove topcap from headset. Pull out fork. Remove brake attatchment. Install headset race on new fork. Cut fork to proper length. Install new starnut into fork. Slide fork into headtube after installing bearings from headset. Tighten topcap and stem bolts. Attatch brake.
These steps are not exactly in order. Installing the race on the fork requires a specialty tool but I've done it twice using various methods. Same with the star nut. You risk damaging the race and setting the star nut wrong with the shadetree method. If your not confident, take it to a shop. They can also recommend a suitable fork.
Well, I followed your instructions...but after you cut the fork to proper length, how do you get the front wheel to stay on?
ed is offline   Reply With Quote
Old 12-15-08, 01:36 PM   #20
dminor 
Moar cowbell
 
dminor's Avatar
 
Join Date: Oct 2004
Location: The 509
Bikes: are awesome.
Posts: 12,427
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Quote:
Originally Posted by chelboed View Post
Well, I followed your instructions...but after you cut the fork to proper length, how do you get the front wheel to stay on?
Silly person . . . you're supposed to cut the stanchions, not the sliders .
__________________

Quote:
Originally Posted by Mark Twain
"Don't argue with stupid people; they will drag you down to their level and then beat you with experience."
dminor is offline   Reply With Quote
Old 12-17-08, 12:50 AM   #21
Jameson
Senior Member
 
Jameson's Avatar
 
Join Date: Mar 2005
Bikes:
Posts: 335
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by chelboed View Post
Well, I followed your instructions...but after you cut the fork to proper length, how do you get the front wheel to stay on?

Really? You're going to pick that? As if anyone would actually cut both legs?
Very weak. Not your best effort I'm afraid, but I'll concede stranger things may have happened. You'd have to be all sorts of dumb though. Just thick headed as heck. The mind boggles imagining such an individual.
For the record, cut the steer tube.
Jameson is offline   Reply With Quote
Old 12-17-08, 04:06 AM   #22
z415
Senior Member
 
z415's Avatar
 
Join Date: Apr 2006
Location: Gainesville/Tampa, FL
Bikes: Trek 1000, two mtbs and working on a fixie for commuting.
Posts: 2,343
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You can always cut the bottom of the drop outs to be more shallow to shed some weight...
z415 is offline   Reply With Quote
Old 12-17-08, 05:12 AM   #23
ed 
.
 
ed's Avatar
 
Join Date: Oct 2005
Location: The Summit of Lee
Bikes: Hecklah
Posts: 10,932
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Jameson View Post
Really?
Really what?

Quote:
Originally Posted by Jameson View Post
You're going to pick that?
I'm gonna pick what?

Quote:
Originally Posted by Jameson View Post
As if anyone would actually cut both legs?
Hence the spirit of the neener in the air.

Quote:
Originally Posted by Jameson View Post
Very weak.
At least I got a nibble.

Quote:
Originally Posted by Jameson View Post
Not your best effort I'm afraid, but I'll concede stranger things may have happened.
I always give 110% to my wonderful BF.net compadre's.

Quote:
Originally Posted by Jameson View Post
You'd have to be all sorts of dumb though.
Didn't you know?

Quote:
Originally Posted by Jameson View Post
Just thick headed as heck.
You obviously haven't spoken with my beloved wife.

Quote:
Originally Posted by Jameson View Post
The mind boggles imagining such an individual.
Just give me a minute...I will astound you.

Quote:
Originally Posted by Jameson View Post
For the record, cut the steer tube.
Went w/o saying...so why waste all this good sarcasm?
ed is offline   Reply With Quote
Old 12-17-08, 06:09 AM   #24
z415
Senior Member
 
z415's Avatar
 
Join Date: Apr 2006
Location: Gainesville/Tampa, FL
Bikes: Trek 1000, two mtbs and working on a fixie for commuting.
Posts: 2,343
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
^ Wow.
z415 is offline   Reply With Quote
Old 12-17-08, 10:17 AM   #25
kenhill3
use your best eye
 
kenhill3's Avatar
 
Join Date: Mar 2006
Location: Olympia, Washington
Bikes: '75 Bertin, '93 Parkpre Team 925, '04 Kona King Kikapu, '05 Bianchi Vigorelli
Posts: 3,058
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Jameson-

Hey, follow Ed's lead! Yer not havin' nearly as much fun as he is!
__________________
"I tell you, We are here on earth to fart around, and don't let anybody tell you any different." - Kurt Vonnegut jr.
kenhill3 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 12:30 PM.