DMR Chain Reactor Chain Accessories

3.2/5 (5 Reviews)


Product Description

· CNC laser cut stainless steel
· Easy to install - it fits under the bearing cup flange.
· Brushed stainless steel finish


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Reviews 1 - 5 (5 Reviews Total)

User Reviews

Overall Rating:4
Value Rating:5
Submitted by Andrew a Weekend Warrior from Abbotsford BC Canada

Date Reviewed: January 22, 2006

Strengths:    It's cheap and works fine.

Weaknesses:    Kind of hard to set up, if you don't know your way around a bottom bracket.

Bottom Line:   
I am actually reviewing the "dual ring" version of this product. It works fine and for the money this is well worth it. However watch out for hidden costs... It's probably available at any LBS in North America, I had to order it from Britain. This added $20 to the price. Then I had to buy a bb tool and a crank puller, there goes another $45. But I should have expected that. Warning: this product doesn't work with Giant STP, Specialized P3 or any DS bike with a pivot right above the bottom bracket. But for me it's perfect.

Expand full review >>

Favorite Trail:   Berminator

Duration Product Used:   Less than 1 month

Price Paid:    $50.00

Purchased At:   online bike shop

Similar Products Used:   Never used a chainguide before.

Bike Setup:   Brodie Hellion

Overall Rating:4
Value Rating:5
Submitted by Andrew a Weekend Warrior from Abbotsford BC Canada

Date Reviewed: January 22, 2006

Strengths:    It's cheap and works fine.

Weaknesses:    Kind of hard to set up, if you don't know your way around a bottom bracket.

Bottom Line:   
I am actually reviewing the "dual ring" version of this product. It works fine and for the money this is well worth it. However watch out for hidden costs... It's probably available at any LBS in North America, I had to order it from Britain. This added $20 to the price. Then I had to buy a bb tool and a crank puller, there goes another $45. But I should have expected that. Warning: this product doesn't work with Giant STP, Specialized P3 or any DS bike with a pivot right above the bottom bracket. But for me it's perfect.

Expand full review >>

Favorite Trail:   Berminator

Duration Product Used:   Less than 1 month

Price Paid:    $50.00

Purchased At:   online bike shop

Similar Products Used:   Never used a chainguide before.

Bike Setup:   Brodie Hellion

Overall Rating:1
Value Rating:1
Submitted by oliver a Downhiller from perth

Date Reviewed: November 1, 2005

Strengths:    DOESN'T fit STP

Weaknesses:    came BENt

Bottom Line:   
DONT BUY

Expand full review >>

Favorite Trail:   goatie

Duration Product Used:   Tested or demo'ed only

Purchased At:   tbe


Overall Rating:3
Value Rating:4
Submitted by Mark a Weekend Warrior from England

Date Reviewed: October 12, 2004

Strengths:    Simple, easy to set up, not much to go wrong

Weaknesses:    Flimsy arm, bit nosiey with the jockey wheel rather than a roller, can sometimes get clogged up with mud if you run big tyres.

Bottom Line:   
I bought this a couple of years ago when I was still at school and poor, there was no way I could afford something like an MRP or Roox so this and the chain cage were my only option. When I first got it I thought it looked a bit cheap and not really up to the job, but to be honest it does what its meant to do and hasn't really let me down under normal conditions. As I said above though its a bit flimsy so can bend out of place easily (not a real problem though, you just bend it back!). It can also collect mud from the rear tyre if its a bit gloopy on the trails seeing as it sits quite close to the corner tread.
Overall not great but what do you expect for £15? Now I can afford something better Im upgrading to a Blackspire, but for the money I couldn't really complain about it.

Expand full review >>

Duration Product Used:   2 Years

Price Paid:    $30.00

Purchased At:   Local Bikeshop

Similar Products Used:   DMR Chaincage, MRP copy (mr control - crap)

Bike Setup:   Norco Torrent, '01 Drop-Offs, On-One 3pc cranks, DMR chaincage, Deore 9spd, Hayes HFX9s, Tioga DH 2.1s etc

Overall Rating:4
Value Rating:4
Submitted by Joe a Weekend Warrior from England

Date Reviewed: June 1, 2002

Strengths:    Can tension up or tension down
Reliable
Easy to adjust once its fitted on


Weaknesses:    Hard to fit on
I had to take off my single freewheel and put my multiple back on and just use the 17t cog because the pulley bolt wasn't long enough and it wouldn't reach my freewheel.
The tensioning screw seems of poor quality - it rounded off using a cross head screwdriver (as the instuctions suggested) very quickly


Bottom Line:   
It took me 2 hours to fit on my bike and even then the pulley wouldn't reach the freewheel so i had to change to a 7 speed sprocket (i suspect i need a proper singlespeed hub actually). It works really well now however, and it is very easy to set up. I prefer tensioning it downwards to prevent the very occasional chainslap i get from landing hard (often from an overshoot) when i have it tensioning up. Overall, if you're patient fixing it on and you have a proper singlespeed hub, i'd say this is an excellent alternative to a bottom bracket mounted chain device. Its also a fair bit cheaper. A good choice for dirt jumpers who like to throw their bike around a bit.

Expand full review >>

Favorite Trail:   anywhere with huge tabletops

Duration Product Used:   Less than 1 month

Price Paid:    $50.00

Purchased At:   Broadribbs (this is actually a review of the DMR Tension seeker, it wasn't listed so i put it here)

Similar Products Used:   Mr Crud DCD - that was so bad it got burnt

Bike Setup:   Barracuda hardtail frame, amoeba stem, amoeba bars, RST fork, FSA cranks (who?), saracen pedals, etc.

Reviews 1 - 5 (5 Reviews Total)

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


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