Koski Engineering Stem Stem

4.64/5 (11 Reviews)
Weight : 235 grams (135mm length)


Product Description

Cold forged 6061-T6 Aluminum extension with welded head
  • 4-Bolt removable bar clamp
  • 1 1/8" Steerer Diameter
  • Available in 5 or 15 degree rise
  • Available in 60, 95, 105, 115, 125 and 135mm lengths
  • Available in Polished Silver or Shot Blast Black
  • Weight: (135mm length) 235g.


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

    Reviews 1 - 11 (11 Reviews Total)

    User Reviews

    Overall Rating:5
    Value Rating:5
    Submitted by Andy from Beautiful BC

    Date Reviewed: June 20, 2005

    Strengths:    Great selection of sizes.

    Bottom Line:   
    Great stem for a great price. Leave the CF and other weight saving crud for the roadies. It has taken the abuse I've dished out with no compaints what so ever. 5 for 5 on this puppy

    Expand full review >>

    Duration Product Used:   2 Years

    Price Paid:    $20.00

    Purchased At:   LBS

    Similar Products Used:   Kalloy

    Bike Setup:   '03 Devinci

    Overall Rating:5
    Value Rating:5
    Submitted by joshster a Weekend Warrior from oakland

    Date Reviewed: October 24, 2004

    Strengths:    strong, powdercoat finish, 4 bolt cap, easy to remove logo

    Weaknesses:    not CF light, but then it's a stem & therefore not the best place to save weight
    Lousy labels (no complaints though)


    Bottom Line:   
    This is a competent, beefy stem with a nice finish. The stickers were peeling, which I think is why it was in a clearance box at the Kelly swap meet. I just used a spoon handle to scrape off the remaining stickers & buffed it out afterwards. Looks sweet now & helped cut down the number of logos on my bike. Peeled the stickers off of my Marzocchi too, so the rig's looking pretty sweet & stealth.

    Expand full review >>

    Favorite Trail:   eldridge grade

    Duration Product Used:   1 Year

    Price Paid:    $10.00

    Purchased At:   Kelly factory swap meet

    Similar Products Used:   kalloy, kona stock (kalloy?), ritchey

    Bike Setup:   kokopelli

    Overall Rating:5
    Value Rating:5
    Submitted by Bizario a Cross Country Rider from Rexford, MT

    Date Reviewed: December 18, 2002

    Strengths:    Price, Qulity, Stiff and looks good.

    Weaknesses:    Weight (but only if you compare it to stems 3X the price)

    Bottom Line:   
    Ok, It’s not a Thomson… but if you are a bit shy on the bucks this is the stem for you. I bought 2 of these as interim stems as I gave my wife the Thomson off my GT and needed a stem till I got something better. I put the other on my Marin MVP to get the geometry right until I could scratch up the bucks for a Thomson. Well, 3 months down the road I have to say that the one on my GT will stay. It looks good, feels stiff and it is a bit on the heavy side; but we are talking about a $19 stem. I will spend the extra cash for the Thomson on my MVP as I like the looks (This is just me being anal) and I strive to keep this bike light. I have had no problem with decals (I’m not sure that they are decals) coming off and the only reason to worry about the amount of torque that you use on these stems is so that you don’t crush your bars. This stem is clearly worthy of being classified with stems over twice its price and the length / angle selection is pretty good.
    Bottom line… I give this stem 5 flaming Habaneros

    Expand full review >>

    Favorite Trail:   Web Mountain

    Duration Product Used:   3 months

    Price Paid:    $19.00

    Purchased At:   Jesan USA

    Similar Products Used:   Thamson Elite, Easton EA 60, a few nopname stems.

    Bike Setup:   2000 GT Zaskar X (Custom) & 2002 Marin Mount Vision Pro

    Overall Rating:5
    Value Rating:5
    Submitted by Hervisaurus a Cross Country Rider from IL

    Date Reviewed: September 23, 2002

    Strengths:    Super stiff, really sturdy 4 bolt removable face plate, good weight to strength ratio

    Weaknesses:    Not available in 0 Degree rise

    Bottom Line:   
    It's one of the nicest stems I've used. It's not the lightest stem in the world, so if you're a super weight weenie, don't bother, but it usually beats stock on most bikes. It's really strong and it's the stiffest part of my front end. Everything else under my hands flexes like hell but this thing doesn't move. The forging on it is beautiful. The only problem I found is the rise. I ride a 21 inch frame with a massive head tube, so the angle of my fork is set way back. It would be nice if they offered it in a 0 degree rise or even a negative. Also everyone else has been complaining about their decals coming off, but my stem is laser etched. They must have gotten ripped off. Simply put, if you're looking for a really lightweight stem, go elswhere, but if you don't give a damn buy this stem, it's fantastic. 5 burning mounds of platypus excrement for the value (can't beat 8 bucks) and, although they didn't have a 0 degree, I'm not gonna penalize them on the overall.

    Expand full review >>

    Duration Product Used:   6 months

    Price Paid:    $8.00

    Purchased At:   Private Dealer

    Bike Setup:   Trek 9900 custom

    Overall Rating:4
    Value Rating:5
    Submitted by Hank a Weekend Warrior from Plano, TX USA

    Date Reviewed: September 5, 2002

    Strengths:    secure fit. The look is okay, but nashbar's version isn't polished, it's a dull silver-like powder.

    Weaknesses:    the brand stickers. Again, nashbar's version isn't polished silver, so it doesn't match the other silver components on my bike. But who cares... I do alittle :)

    Bottom Line:   
    For $10, this is a good deal. I still like the polished silver version!!

    Expand full review >>

    Duration Product Used:   Less than 1 month

    Price Paid:    $10.00

    Purchased At:   nashbar

    Similar Products Used:   stock trek and stock mongoose

    Bike Setup:   Mongoose Zero G3 2001, duke C, oury grips, syncros aluminum flat stem

    Overall Rating:4
    Value Rating:5
    Submitted by blasto a Weekend Warrior from Deer Park, NY

    Date Reviewed: November 29, 2001

    Strengths:    4 bolt pattern
    super strong
    stays tight


    Weaknesses:    none yet

    Bottom Line:   
    The four bolt pattern stays tight, holds bar secure
    Black shot-peened looks great
    Beautifully forged--no welds
    Great value

    Expand full review >>

    Favorite Trail:   Cathedral Pines

    Duration Product Used:   1 Year

    Similar Products Used:   titec

    Bike Setup:   '99 voodoo hoodoo, xt driven, truvativ stylo, avid brakes, salsa post

    Overall Rating:4
    Value Rating:5
    Submitted by Jim T a Weekend Warrior from Flatlands : (

    Date Reviewed: April 19, 2001

    Strengths:    Fit and finish, strength, very nice welds.

    Weaknesses:    Why finish this beautiful stem with crappy decals, even my stock marin stem is screen printed.

    Bottom Line:   
    Looks like a nicely made product, upon installation the decals started peeling off the beautiful shot peened finish. The 4 bolt clamp holds the bar securely and the stem clamp works fine. The welds are consistant and fit and finish are beautiful, why would you finish off such a nice product with crappy decals. With the decals coming off in my hands and the rise not exactly what I wanted (this was my fault not Koskis)this went back, and I purchased a Thomson.

    Expand full review >>

    Favorite Trail:   Nebo Ridge, Story, IN

    Duration Product Used:   Tested or demo'ed only

    Price Paid:    $30.00

    Purchased At:   mail order


    Overall Rating:5
    Value Rating:5
    Submitted by peter a Cross Country Rider from herndon,va

    Date Reviewed: January 15, 2001

    Strengths:    cost, looks great

    Weaknesses:    none so far

    Bottom Line:   
    not only does the shot peen finish look great, the stem is fully funtional with no problems. the four bolt clamp holds with no problem. the decal is not laser etched, but once its fully off, i probably will not replace. best stem i have had so far.

    Expand full review >>

    Favorite Trail:   difficult run

    Duration Product Used:   3 months

    Price Paid:    $10.00

    Purchased At:   mtbr.com

    Similar Products Used:   ritchey, kalloy, coda

    Bike Setup:   hardtail with rockshox and litespeed handlebar

    Overall Rating:5
    Value Rating:5
    Submitted by Christian a Weekend Warrior from Warrenton VA

    Date Reviewed: December 11, 2000

    Strengths:    Stiff
    Looks cool
    4 bolt pattern
    Takes a hell of torquing on screws and like it


    Weaknesses:    Black version should sya mad max on it

    Bottom Line:   
    I really really really like this stem, got it free with the purchase of my fork and front wheel from supergo (boy that rhyno lite rim they sent was old!! cheapskates :) )

    Along with my ringle uncle jesse bar and my 20mm axle, it makes a hell of a stiff front end for my bike! The only flex left comes from within (or something)

    At first I thought this stem would never fit the kinda rinding I wanted to do with it (jumping and some light trials and DS), but it works GREAT with azonic's DS1 frame... (talk about cheapskates try Azonic) (cheap bashtaaads)... (their frame still is cool tho)

    Anyways, this stem rocks and it rocks even more coz t'was free...

    Christian =)

    Expand full review >>

    Favorite Trail:   old pharm

    Duration Product Used:   3 months

    Similar Products Used:   Klein stems, generic stems, etc

    Bike Setup:   Azonic DS1, bomber Z3QR20, rhyno lites, HS33s, ringle uncle jesse bar, FSA pig headset, Haro platform pedals, koski stem

    Overall Rating:4
    Value Rating:5
    Submitted by Tom a Cross Country Rider from Boxford, MA

    Date Reviewed: October 29, 2000

    Strengths:    cool looking
    doesnt loosen up
    not very heavy


    Weaknesses:    the logo is not lazer etched, its stuck on w/ decals

    Bottom Line:   
    pretty good stem, i got it in a build kit and i havent had any trouble with it. Looks like its pretty durable. the stickers are kinda cheap looking

    Expand full review >>

    Duration Product Used:   3 months

    Similar Products Used:   sun ringle, kore


    Bike Setup:   Santa cruz chameleon,XTR, Z.3 flylight

    Overall Rating:5
    Value Rating:5
    Submitted by David a Cross Country Rider from northern Kentucky

    Date Reviewed: September 1, 2000

    Strengths:    S-T-R-O-N-G
    pleasingly consistent welds
    overall finish and quality
    125mm size availability...(PERFECT)


    Weaknesses:    the Koski logo or moniker is not painted or laser-etched, so the stickers that are on this shot-peened finish stem have peeled off waaaayyyy too easy...however, Eric Schurr at Koski hooked me up with a whole envelope of replacement decals...
    ...and it's not OVERLY light, really...around 224 grams for the 125mm, I believe...no matter though, I can readily notice the attributes of its strength to weight ratio, so no complaints.


    Bottom Line:   
    So far, no problems whatsoever (aside from the silly decal thing)...This stem is the 4-bolt pattern and has proven to be a VERY solid XC stem...I have not been able to flex it at all and it has not creaked or come loose...not even once. I had a bit of a problem keeping my RF SYStem tight and "creak-free"...Suffice to say, I am content.

    Expand full review >>

    Favorite Trail:   Otter Creek or Cave Run

    Duration Product Used:   3 months

    Price Paid:    $60.00

    Purchased At:   bikeworld.com

    Similar Products Used:   RaceFace SYStem, Control Tech, Kore

    Bike Setup:   Santa Cruz Chameleon, Marzocchi X-FLY, KING wheelset, RaceFace/XT/XTR drivetrain...

    Reviews 1 - 11 (11 Reviews Total)

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


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