Rotor RS4x Ti Crankset

5/5 (3 Reviews)

Product Description

The only Crankset that truly eliminates the dead spot, (the top crank is 15 degree past upper dead spot when lower crank is at dead spot) Rotor Cranks are the best solution available on the market to prevent and alleviate knee injuries.
  • Available in MTB, Road 2 and Road 3 versions
  • Results in 10% more power in climbing and acceleration, and a reduction in lactates.
  • Weight: 1190g (cranks + chainrings + bb assembly)
  • Anodized black aluminum chainrings
  • Titanium spindle - aluminum crankarms
  • Available chainrings: 24/34/44, 46
  • Crank lengths: 165, 170, 172.5, 175 & 180

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    Reviews 1 - 3 (3 Reviews Total)

    User Reviews

    Overall Rating:5
    Value Rating:5
    Submitted by i1dry? a Weekend Warrior from Toronto, Canada

    Date Reviewed: July 17, 2007

    Strengths:    Pedelling efficency!

    Weaknesses:    A bit heavier than tradional cranksets.

    Bottom Line:   
    I had reconstructive knee surgery some 20 years ago and about 5 years ago I found that I could barely walk after a weekend of riding. I heard that the Rotor cranks were easier on the knees so I picked up a set and my knee pain disappeared. It took me about 5 yards to get used to the different pedelling cycle and after that it was un-noticeable.

    The added bonus is that this crank-set actually delivers greater pedelling efficiency and power to the rear wheels! While it's a bit heavier than a XT crank-set, the added weight is more than offset by the power gain. This is most evident on steep technical climbs.

    One of the guys who I ride with on a regular basis (without knee problems) got a set of Rotors simply for the power gain. Neither of us would go back to regular cranks.

    The bottom line is, I simply would not be able to ride without them. I highly recommend them to anyone who has knee problems and to those who want to do more with less energy expenditure.

    Expand full review >>

    Favorite Trail:   technical single track

    Duration Product Used:   More than 3 years

    Similar Products Used:   Shimano XT, XTR and others

    Bike Setup:   Titus Motolite Exogrid

    Overall Rating:5
    Value Rating:5
    Submitted by Victor Cabezas a Downhiller from Madrid

    Date Reviewed: June 7, 2006

    Strengths:    Tey can handle downhill abuse fine, you accelerate much better (great after corners), smooth pedalling at high cadences.

    Weaknesses:    One possible 'weakness' is that they are only compatible with non roller chain guides. (I use an e-13, no problems)

    Bottom Line:   
    I can actually go uphill on my DH bike now! These things are great for getting back up to speed after corners, and give me a big edge on other racers in 4 cross as well.

    Expand full review >>

    Duration Product Used:   2 Years

    Similar Products Used:   FSA cranks, XT cranks.

    Bike Setup:   Intense m3, 165 diabolus, mavic Deemax wheels 06, hope M6 brakes, xt derailleurs, grip shift.

    Overall Rating:5
    Value Rating:4
    Submitted by Phill Lucas a Cross Country Rider from Spain

    Date Reviewed: May 9, 2006

    Strengths:    Extra Tourque, Less fatigue, More endurance, Looks High Tech, alloows me to kick peoples butts who used to kick mine.

    Weaknesses:    The only weakness I can see, is that a normal crank requires 0 maintenance and this will need to be maintained, but I dont mind maintaining my gears or shocks, so maintaing the crank will be fine.

    Bottom Line:   
    I was amazed when I bought this crank. It shaved 6 minutes off a 45 minute climb!!! It gives advantages in a higher aerobic limit(3kph more in evil steep climbs), more torque(technical climbs are much easier, and when I am exhausted and make a shifting mistake, I dont stall like i used to), less fatigue (after 8 hours in the saddle I can now still stand up and sprint).

    Bottom line: this is the best performance upgrade I have ever bought. It is heavier than a normal crank, but my sus fork is heavier than a rigid one, and my derailleur kit is heavier than a singlespeed setup. I have them because they are a functional weight. So is the Rotor. I'd rather have a faster bike that i can ride more k's at a higher speed, than a weight weenies wet dream that is useless in climbs and hammers me.

    Expand full review >>

    Favorite Trail:   Anything round Frejus, France

    Duration Product Used:   1 Year

    Similar Products Used:   XTR '05, XT '03, Race face forged from 98, Sugino Impel from 96,

    Bike Setup:   Klein Palomino, XTR/Rotor, Chris King hubs + headset, maxic disk rims, Fournales shark front fork, thomson seatpost + stem, monkey light handlebars, goobi ti saddle

    Reviews 1 - 3 (3 Reviews Total)

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