RockShox J4 2006 Front Shocks

3.62/5 (13 Reviews)
Weight : 2182 grams


Product Description

  • Travel: 80-125mm
  • Steerer Tube: Steel
  • Damping: TurnKey Lockout
  • Crown: Forged 6061 T-6 aluminum


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Reviews 1 - 13 (13 Reviews Total)

User Reviews

Overall Rating:1
Value Rating:2
Submitted by matt30577 a Weekend Warrior from toccoa, ga usa

Date Reviewed: June 14, 2009

Strengths:    cheap, good travel

Weaknesses:    plastic threads on the lockout and maybe the same on the travel adjustment??? The lockout popped right out on a 2 foot dropoff and sprayed oil everywhere. You can't find a kit to fix or rebuild it

Bottom Line:   
It would be a really good fork if it didn't have those plastic threads on that fork. who would put plastic on metal and expect it to hold on some pressure like that. It was on racoon mtn. in chatanooga, tn

Expand full review >>

Favorite Trail:   racoon trail

Duration Product Used:   1 Year

Purchased At:   came with bike

Similar Products Used:   cannondale super v1000 freeride with tiple crown fork

Bike Setup:   06 GT IDrive 5 4.0 with a fox vanilla spring and oil rear shock, stock everything else

Overall Rating:3
Value Rating:5
Submitted by max a Weekend Warrior from larchmont

Date Reviewed: September 4, 2007

Strengths:    This fork handled everything. jumps, 5 FEET, some drops, im a wuss, and of course logs and rocks. has worked well for 1 1/2 years

Weaknesses:    in the last half year the lockout stopped working, the rebound adgust got screwed up. it started to top out (rebound to fast) and bottom out.

Bottom Line:   
really good, great feeling, but get a more tough fork if you plan to have it for a loooong time.(i wanted it to last till collage, thats three more years)

Expand full review >>

Favorite Trail:   sprain parkway

Duration Product Used:   2 Years

Purchased At:   came on bike

Similar Products Used:   none so far

Bike Setup:   mavic wheels, 2.1 inch tires. lx rear derailer and shifters. hone front derailler and cranks. ario rear shock with lockout

Overall Rating:4
Value Rating:5
Submitted by Robie a Cross Country Rider from Waterloo Ont Canada

Date Reviewed: July 4, 2007

Strengths:    Takes a liken keeps on tiken. Length of travel adjustment. Lockout for roading. Easy adjustment.

Weaknesses:    Seals starting to leak gonna need to replace. Does not come with manual for self repair. Will do it anyway hopefully won't wreck it. Make sure you follow set up guide if you over dampen on rough terain you could bottom it out this happens because not enough time for full rebound between hits.

Bottom Line:   
Good solid fork for XC. have raced Albion Hills, Lake to Lake 50K, Paris to Ankaster 60K, trail ride Hardwood hills, the Pines, Ride the hydro cut 2 or more times a week. Bottom line this fork stands up to more than it should excellent value. Its not meant for huge drops so don't expect it to last if you use it for this. If your into full downhill or huge drops this fork is not for you. It is however good solid XC fork.

Expand full review >>

Favorite Trail:   HydroCut

Duration Product Used:   1 Year

Purchased At:   King Street Cycle

Bike Setup:   Came on 2006 Brodie Fury.

Overall Rating:5
Value Rating:5
Submitted by chris a Weekend Warrior from irvine, ca

Date Reviewed: May 23, 2007

Strengths:    light weight, travel adjustment, rebound adjustments, lockout feature.

Weaknesses:    looks

Bottom Line:   
this fork came installed on my 2006 gt id5. it's beenn great so far (about a year now). do both climbing and downhill and this fork has performed very well over all kinds of terrain. love the fact that you can adjust the travel and rebound...and the lockout feature comes in handy on climbs...and it you do hit a bumb in the road with the lockout engaged it will release before any damage is done. very sweet fork for the price. i'm 230lbs and it's never bottomed out on me.

Expand full review >>

Duration Product Used:   1 Year

Purchased At:   performance bike


Overall Rating:4
Value Rating:5
Submitted by Billy a Weekend Warrior from San Jose, Ca

Date Reviewed: May 3, 2007

Strengths:    I got the U-turn with the lock out. Rides nice, the lockout is cool for going uphill. Also the flexability of the adjustable travel is cool too.

Weaknesses:    U-turn knob cracked. Was only $15 at a local shop. Any years knob should work so you can get different colors if you want.

Bottom Line:   
Great shock for the price. I don't take big airs, maybe 3' of drop at the most so far but it's held up to everything I've thrown it at so far. Good for cross country/ all mountain who doesnt have hundreds of dollars for a lightweight kick butt fork. could go for the air version to save weight but give up the option to adjust travel on the trail.

Expand full review >>

Duration Product Used:   1 Year

Price Paid:    $185.00

Purchased At:   Ebay

Bike Setup:   99 Specialized FSR Sport, Fox Vanilla Air rear, Rock Shox J4 U-Turn fork, Avid BB7 Discs, Crank Brothers Speedy pedals

Overall Rating:3
Value Rating:3
Submitted by Eduard Betiuc from campulung moldovenesc, Romania

Date Reviewed: April 8, 2007

Strengths:    lite, smooth travel,U-turn

Weaknesses:    lock-out, oil leaks, plastic parts

Bottom Line:   
.

Expand full review >>

Duration Product Used:   6 months

Price Paid:    $180.00

Bike Setup:   giant boulder, after that kona shred (street riding)

Overall Rating:4
Value Rating:4
Submitted by jacob a Weekend Warrior from Australia

Date Reviewed: January 4, 2007

Strengths:    i would just like to say that the review by julie is a real load. Lateral flex , weak, honey your just fat 120 pounds my arse if youre flexing these that much you need DH forks just to ride to the deli and there not expensive your just a pov fatty craving attention go lose some weight get some friends cry a river and get over it crist sake.

Weaknesses:    Nothing just a little ugly.

Bottom Line:   
these are a good all rounders.

Expand full review >>

Duration Product Used:   Tested or demo'ed only

Price Paid:    $320.00

Purchased At:   u-pedal

Similar Products Used:   mozos

Bike Setup:   Raleigh m800 j4s the usuall.

Overall Rating:5
Value Rating:5
Submitted by James a Cross Country Rider from Alberta

Date Reviewed: September 9, 2006

Strengths:    Adjustable travel, lockout.

Weaknesses:    U-Turn knobs feel cheap, though work well.

Bottom Line:   
Great shock. Not sure that the above complaint is valid as it's not a freeride fork and if you're bottoming 125mm out on a regular basis you might want to consider something else. If I were racing seriously I'd probably want something a bit lighter but for recreation this fork is more than enough for me.

U-Turn knobs are plastic and can feel a bit cheap and can also be turned pas the functional extremes if not careful, resulting in a situation where, if you're not familiar with the fork travel, you might damage the mechanism. It even says as much in the manual.

Expand full review >>

Duration Product Used:   3 months

Price Paid:    $200.00

Purchased At:   Ridley's

Bike Setup:   Stock '06 Brodie Fury.

Overall Rating:4
Value Rating:5
Submitted by Jack Edwards a Weekend Warrior from Sacramento

Date Reviewed: August 17, 2006

Strengths:    Travel adjust works well and also has a rebound adjust that works all right not expensive

Weaknesses:    could be stronger

Bottom Line:   
good inexpensive fork for a little bit harder trails

Expand full review >>

Duration Product Used:   3 months

Price Paid:    $200.00

Purchased At:   Mad catz bikes

Similar Products Used:   Marzocchi Mz3

Bike Setup:   Ironhorse warrior trail

Overall Rating:4
Value Rating:5
Submitted by woody a Weekend Warrior from melbourne, victoria, australia

Date Reviewed: July 19, 2006

Strengths:    the travel adjustment is easy and "clicky" in its use. the rebound has a wide range of adjustjment and is easy to use. these forks perform very well for their price.

Weaknesses:    these forks could be plusher but for the price i played this is no real problem

Bottom Line:   
i got these forks on sale half a year ago and have ridden them frequently since then. they perform very well considering the price. the adjustments are good (but i dont really use the lockout). i can get the full 125 mm of travel from these forks and like having the travel which i can adjust. compared to my old judy tt's these forks are a dream to ride.
i do find these forks work best when i grease the seals but this does not need to be done that regularly. while not the plushest forks, they perform very well for the price.

Expand full review >>

Favorite Trail:   castlemain piney

Duration Product Used:   6 months

Price Paid:    $370.00

Similar Products Used:   rockshox judy tt

Bike Setup:   2005 giant iguana with j4's, azonic seat, hayes sole's and x-7 derailler and shifters

Overall Rating:5
Value Rating:5
Submitted by george a Cross Country Rider from pa

Date Reviewed: May 25, 2006

Strengths:    very durable...excellent on all types of trails

Weaknesses:    nothing really...excellent fork

Bottom Line:   
this fork is awsome! i love it. its excellent for every type of riding..if your climbing hit the switch and lock the forks out almost completely...to turn them back on hit a button...you can turn the fork down to 80mm of travel and make it stiff...or turn it up to 125 mm of travel and have it nice and soft to absorb every bump. i ride just about everything...from fast down hills to climbing to jumping off of drops about 5 or 6 feet high. i have a hardtail and the front shock does a lot. i highly recommend this. i have had it for about 6 months...ride the balls off it...and no problems yet. try it out...you wont regret it...!!!!

Expand full review >>

Favorite Trail:   the rocks, baha's,the loop,

Duration Product Used:   6 months

Price Paid:    $200.00

Purchased At:   spokes n' skis

Bike Setup:   rock shox j4 with 80 to 125mm of travel with remote lockout

Overall Rating:1
Value Rating:1
Submitted by Julie a Cross Country Rider from Canada

Date Reviewed: May 25, 2006

Strengths:    NONE unless you ride on the bike path

Weaknesses:    IT'S WEAK, Lateral stress and the fork turns on it's own, sticks when bottomed. Had to get the seals repressed after a few rides.

Bottom Line:   
This is my first Rock Shox and after all the big man Rock Shox talk this fork is not worth the money. I got this a few months ago and I'm regreting it big time. It bobs like crazy, has lots of lateral flex and it sticks when bottomed. Upgrading it is essential and going to cost me an arm and a leg. I should have just gotten another manitou cause I'm going to hurt myself on this thing. If your slightly aggresive on the trails (I only weight 120) do not get this fork.

Expand full review >>

Duration Product Used:   Less than 1 month

Price Paid:    $200.00

Similar Products Used:   single crown Manitou's and an old Marzochi

Bike Setup:   RM XC

Overall Rating:4
Value Rating:5
Submitted by Donnie Nix a Weekend Warrior from Woodstock, GA

Date Reviewed: May 19, 2006

Strengths:    U-Turn, well built, looks damn good

Weaknesses:    Adjustment knobs feel cheap but still work well

Bottom Line:   
I was surprised how well this fork worked, since it's basically the bottom feeder of the Rock Shox line. The U-Turn adjustment is fantastic. This shock works well for nearly all types of trail riding, and with the lockout, makes road riding real pleasant. It's a nice looking fork for a lower end bike, it's not too heavy, has plenty of adjustments, and provides a plush ride over the roughest terrain. It's no Reba, but it really wasn't meant to be. Compared to other forks in this price range, I'd give this one a 5 of 5.

Expand full review >>

Favorite Trail:   Bear Creek, GA

Duration Product Used:   3 months

Price Paid:    $170.00

Purchased At:   LBS

Bike Setup:   My son's 05 Specialized Hardrock Sport Disc, large

Reviews 1 - 13 (13 Reviews Total)

Review Options:  Sorted by Latest Review | Sort by Best Rating


Judy J4 U-Turn Red Spring Wanted

Hey guys, it turns out i've been running a blue spring, too powerful for my weight which has resulted in me only being able to use 3.5" of my 6" front travel. I currently weigh 140 lbs and gain about a pound a week (bodybuilding), so I will be needing a Red (Medium) spring. The weird thing is th ... Read More »

Rock shox j4

How do you adjust the compression on a Rock shox J4? It is factory set WAY to stiff for all mountain or any type of riding other than uphill:rolleyes: I am slowly becoming a member of rock shox sucks group.... Any help will be appreciated I am looking for a quick fix maybe just turning a ... Read More »

New J4 or upgrade old Judy?

Ok so I have an old 1996 Judy xc with with about 60mm of travel and elastomers in it. I'm getting to the point where i need to get a new fork. So what do you all recommend i should do. Buy a Total air upgrade kit for my old judy, which would replace all the insides with all air and upgrade the ... Read More »

Judy J4 or Upgrade old Judy with Total Air?

Ok so I have an old 1996 Judy xc with with about 60mm of travel and elastomers in it. I'm getting to the point where i need to get a new fork. So what do you all recommend i should do. Buy a Total air upgrade kit for my old judy, which would replace all the insides with all air and upgrade the ... Read More »

Judy J4 or Upgrade old Judy with Total Air?

Ok so I have an old 1996 Judy xc with with about 60mm of travel and elastomers in it. I'm getting to the point where i need to get a new fork. So what do you all recommend i should do. Buy a Total air upgrade kit for my old judy, which would replace all the insides with all air and upgrade the ... Read More »

Read More »



 

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