Results 1 to 37 of 37
  1. #1
    mtbr member
    Reputation: bridger's Avatar
    Join Date
    Dec 2010
    Posts
    245

    tall riders/ 180mm cranks?

    How many tall (6'2"+) are using 180mm cranks? I've been running 180mm for the extra leverage but others are trying to convince me that 175's will lessen the pedal strikes, etc.
    "Prollyisnotprobably"

  2. #2
    mtbr member
    Reputation:
    Join Date
    Aug 2011
    Posts
    31
    Quote Originally Posted by bridger View Post
    How many tall (6'2"+) are using 180mm cranks? I've been running 180mm for the extra leverage but others are trying to convince me that 175's will lessen the pedal strikes, etc.
    6'3"+ w/ 180mm on mtn and road. I can't imagine going back to 175mm on mtn. Road is another matter. More important for gearing to match the rides I guess w/ the longer cranks.

    Yes. Pedal strikes increase. My airborne adventures have been more numerous on 180mm. Leverage? Imagine the crank being a long lever... you are at speed.. pedal slams on rock coming around... UFO!

  3. #3
    mtbr member
    Reputation: El_Bendejo's Avatar
    Join Date
    Jul 2006
    Posts
    98
    6'4". I've ran 180mm and 175mm cranks. i can't tell the difference in leverage or # of pedal strikes. If I were in the market for new cranks I'd try to find some 180s. but if I couldn't i'd go 175 no issue.

  4. #4
    Laker and a Trail Blazer
    Reputation: Broncstad's Avatar
    Join Date
    Aug 2009
    Posts
    813
    I have 180mm and want 175mm. I've started riding more aggressive and pedaling DH on rocky stuff so pedal strikes is an issue. Not sure 175mm will make a huge difference but willing to try. 6'4"

  5. #5
    mtbr member
    Reputation:
    Join Date
    Apr 2011
    Posts
    5,029
    I would really be beside myself if you could, blindfolded, on the same exact bike, tell the difference between 175 and 180mm.

  6. #6
    mtbr member
    Reputation: phoenixnr's Avatar
    Join Date
    Jul 2009
    Posts
    537
    6'2" 175's. Don't want the extra pedal/crank strikes.

    Sent from my cm_tenderloin using Tapatalk 2

  7. #7
    mtbr member
    Reputation:
    Join Date
    May 2005
    Posts
    922
    I have 175's on my FS and 180's on my HT.....hard to tell any difference.

  8. #8
    mtbr member
    Reputation:
    Join Date
    Mar 2008
    Posts
    77
    6'8" and 200mm mtn and 205mm road. Once you go long you never go back.

  9. #9
    R.I.P. DogFriend
    Reputation: jeffj's Avatar
    Join Date
    Jan 2004
    Posts
    6,515
    Long and thin goes further in, but short and fat is where it's at!

    Oh wait, wrong crank type

    I would probably benefit a little from longer crank arms, and have briefly tried them, but couldn't immediately perceive any real benefit. However, I have no desire to go out of my way to purchase a set (usually at a premium) only to increase the likliehood the pedal strikes with little benefit. Pedal strikes suck bad enough when climbing, but pedal strikes at high speed REALLY SUCK.

  10. #10
    mtbr member
    Reputation:
    Join Date
    Jul 2011
    Posts
    15
    180 on one road bike, 210's on the other.

    175 on the MTB.

    Definitely notice the difference going to/from the 210's.

  11. #11
    mtbr member
    Reputation: GTscoob's Avatar
    Join Date
    Apr 2009
    Posts
    2,268
    Quote Originally Posted by phoeve View Post
    6'8" and 200mm mtn and 205mm road. Once you go long you never go back.
    I really need to hit you up about trying those monster cranks the next time I'm up on that side of town.

    I've got 180s on everything now and love them. My knees get upset on demo bikes with 175mm cranks and I love the slightly lower center of gravity the longer cranks allow.

    If your bike has a tall enough bottom bracket to minimize pedal strikes with 180mm cranks, do it! Power output might not change but comfort cannot be measured as a performance metric.

  12. #12
    mtbr member
    Reputation:
    Join Date
    Aug 2012
    Posts
    197
    What size cranks come on an XL bike?

  13. #13
    mtbr member
    Reputation: GTscoob's Avatar
    Join Date
    Apr 2009
    Posts
    2,268
    Quote Originally Posted by curly1 View Post
    What size cranks come on an XL bike?
    I've never seen a bike come from the factory with more than 175mm cranks.

  14. #14
    mtbr member
    Reputation:
    Join Date
    Sep 2011
    Posts
    46
    6'3". Recently switched from 170mm to 180mm. Definately more pedal strikes but I love the extra leverage. I won't be going back

    Craig Mac

  15. #15
    mtbr member
    Reputation:
    Join Date
    Jan 2004
    Posts
    7,967
    Ran 175's for 10 years before I made the switch to 180's. Definitely noticeable imo. I built a light duty commuter /mtn bike and thought 175's would work as they were cheaper and more common. I found it took more effort to climb steep hills. As far as pedal strikes most mtn bikes are designed w/ such low BB heights they pedal strike w/most crank sizes.

  16. #16
    turtles make me hot
    Reputation: NYrr496's Avatar
    Join Date
    Sep 2008
    Posts
    7,438
    I swapped to 180's from 175 on an XL Stumpjumper. I'm 6'4". They definitely feel better to me.
    I like turtles

  17. #17
    turtles make me hot
    Reputation: NYrr496's Avatar
    Join Date
    Sep 2008
    Posts
    7,438
    Curly, I guess maybe I got a few more strikes early on... I used to ride with CB Mallets. I switched to Eggbeaters and worked on my technique a little. Not so many strikes any more.
    I like turtles

  18. #18
    Ride da mOOn Moderator
    Reputation: NEPMTBA's Avatar
    Join Date
    Apr 2007
    Posts
    7,923

    New question here.

    Quote Originally Posted by phoeve View Post
    6'8" and 200mm mtn and 205mm road. Once you go long you never go back.
    May I ask what cranks you are using, were they custom made?

    Thanks

  19. #19
    mtbr member
    Reputation:
    Join Date
    Sep 2008
    Posts
    140
    I am 6'05" and when I had a custom road frame built several years ago, I was talked into going with an uber expensive TA 180mm crank. I could not get used to it and eventually went back to a 175mm. I was surprised I noticed a difference but I sure did. I think if you push the pedals more as most people do on a MTB, the extra leverage would be good. If you spin more, as you should on a road bike, the difference is more pronounced due to the bigger circles you are making. I have always had week hip flexers and speculating the longer arms made me feel weaker on the return/up stroke.

    From reading the other posts it appears most taller riders like the longer arms so I stand alone here. I hated to take off the TA Crank since it was easy on the eyes.

  20. #20
    mtbr member
    Reputation:
    Join Date
    Jul 2011
    Posts
    15
    I'll speak up for the custom length crank options.

    Zinn has a couple options - his Zinntegrated cranks or old school 3 piece. Additionally he's managed to source some cranks likely from his supplier for the KHS bike. My impression: His cranks are the reference standard. Beefy and well done. Down side? Price - like $700.

    High Sierra Cycle also has them. Looks like they made Zinn's 3 piece for Zinn, so those are a little cheaper. I'd avoid their "new" integrated design like the plague. Their detachable spider has been nothing but headaches for me.

    LAXPatrick

  21. #21
    mtbr member
    Reputation: Joules's Avatar
    Join Date
    Oct 2005
    Posts
    2,815
    Unfortunately, the trend toward lower BBs has pretty much ruled out anything longer than 175 for me - most of where I ride, there would be a dead spot around BDC that you just couldn't pedal most of the time.

  22. #22
    mtbr member
    Reputation:
    Join Date
    May 2011
    Posts
    24
    I run 180's on my Cannondale Prophet - yes had more strikes but learned to be a little more aware - the longer cranks really helped my knees and power..
    When I upgraded to 650b's that raised the frame just enough to remove any issues (I love the 650b's all around)... I would never go back to 175's, 180's a big difference for me. 6'4" age 56..

  23. #23
    Ride da mOOn Moderator
    Reputation: NEPMTBA's Avatar
    Join Date
    Apr 2007
    Posts
    7,923
    That is double good...

    ...180mm cranks and upgraded to 650B

  24. #24
    Ultimated Outsider
    Reputation: sundowner's Avatar
    Join Date
    Mar 2007
    Posts
    556
    I been riding with 180 for over 25 years. I few years ago I try 177.5 cranks to try and minimize pedal strike and could not get used to them,and 175 were worst. Had to put my 180 back on.
    If I disagree with you, it's because you are wrong.

  25. #25
    mtbr member
    Reputation:
    Join Date
    May 2011
    Posts
    535
    Quote Originally Posted by phoeve View Post
    6'8" and 200mm mtn and 205mm road. Once you go long you never go back.
    Do 200's really help that much? with real long legs you spin bigger circles and in theory which is probably fact it should allow a long femur bone to apply more torque driving straight downward rather than having your knee bent pushing down at more of a angle with shorter cranks rather than straight down with cranks that match the length of your femur?.

  26. #26
    mtbr member
    Reputation:
    Join Date
    Apr 2008
    Posts
    288
    Switched to 180s a few years ago. I could tell the difference immediately. I'm 6'2" but have femur of 6'6"ish frame. That's where I think the difference is. With a long femur a longer crank allows for a better motion through the stroke. It's why we don't have 140s on adult bikes. If it didn't matter, we would.

  27. #27
    cdouble
    Reputation:
    Join Date
    Jul 2007
    Posts
    243
    6'4", switched from 175 to 180 on my single speed. Didn't notice a huge difference in peddling or strikes, but for a while some knee pain. Maybe just old (51). But 180s make sense, gotta be easier so if I had to choose, would go 180.

    cdouble
    http://mo7s.blogspot.com
    cdouble

    http://mo7s.blogspot.com

    "It never gets easier, you just go faster"
    Greg LeMond

  28. #28
    mtbr member
    Reputation: asphaltdude's Avatar
    Join Date
    Sep 2008
    Posts
    609
    6'5"
    'm on 180's on both SS mtb and geared road bike, but I also have bikes with 175 and 170 and I don't notice that much of a difference actually.
    Ride more!

  29. #29
    mtbr member
    Reputation:
    Join Date
    May 2012
    Posts
    19
    I'm 6'3" and ride 180mm on my road bike, 177.5mm on my cross/commuter bike, and have 175mm on my mtn bike. I like the longer cranks, but try to limit the road and rock strikes.

    Would love to try 185mm or 190mm on my road bike if they were more mainstream!

  30. #30
    I am the Tin Man!
    Reputation: grizzlyplumber's Avatar
    Join Date
    May 2008
    Posts
    390
    Im 6-3 and run 180 on my hardtail, which is also my commuter when I throw road tires on it. Not a big difference but I can definitely tell if I am paying attention. Both my bikes are 29ers so I think my bb is a little higher, makes me not worry about pedal strikes.
    Flyin the TallBoy...Clyde style.


    SOMEBODY I LOVE NEEDS A HEART!

    I AM AN ORGAN DONOR, ARE YOU?

  31. #31
    Frys With That, Please
    Reputation: cda 455's Avatar
    Join Date
    Aug 2010
    Posts
    409
    Running 180mm on my commuter.


    All my other bikes have 175mm crankset.

    The reason I swapped in the BMX 180mm cranks is to see if I can tell any difference between 175mm and 180mm in the saddle. Rides less than 3.5 hours I don't really feel a difference. At 3.75 hours I start to feel every revolution like the cranks grew to 210mm .

    Out of the saddle I really feel the additional 5mm via leverage. I would probably even like 185mm for out of the saddle climbing.


    As a side note I'll be training for centuries and double centuries (Road) I might swap to a 172.5mm to deal with hour 4 through hour 14.


    When my son and I start bike camping next summer I'll probably use the 180mm with small chainrings (38/26T).
    2012 Cannondale Trail SL 29ER 4

    1994 Cannondale Super V 1000

    1996 Cannondale F500 rigid-fork 69'er

    Motiv 26'er

  32. #32
    sandbagger
    Reputation: airmiller44's Avatar
    Join Date
    Aug 2009
    Posts
    516
    Nobody that i saw has mentioned that you will get a longer stroke with a thinner pedal.

    I ride canfield crampons you gain a quarter inch of pedal stroke and a quarter inch of ground clearance. the pedal is 11mm thick.

    Now thats not to say your actual crank arm wont hit but for pedal strikes and leverage you gain both.

    This may be a viable solution to you all as it has been for me.

    Assuming you are running flats.
    V10.5 with Dorado pro and Vivid Air
    TWOSIXBIKES DJ prototype
    Www.twosixbikes.com
    www.facebook.com/twosixbikes

  33. #33
    mtbr member
    Reputation: EBasil's Avatar
    Join Date
    Jan 2004
    Posts
    2,088
    I'm 6'5", with a 34" inseam. I've had 180's on all my bikes, including the beach cruiser, since the 90's and have no trouble at all with pedal strikes due to a 5mm extension. I do feel the difference on climbs, however, when riding a new bike I haven't swapped cranks on, yet.

  34. #34
    mtbr member
    Reputation:
    Join Date
    Nov 2012
    Posts
    973
    roadie just getting into mtb. HAve a torn ACL in my left knee which is why i started cycling 2.5 years ago. I'm 6'3" with long legs and used to ride 170mm on my road bike but when I bought a brand new bike the larger frame size came with 175 and switching it out wasn't an option (bikes direct). The hardcore roadies I ride with are amazed at a big man like me and my ability to spin. I simply tell them that it was out of necessity, I didn't want to make my knee worse. from riding with these guys I've built up confidence that my knee is fine for cycling so I mash a bit more now but I still don't mind the shorter cranks. As strong as I am, it's a moot point. I can see how in MTB'ing where you have rough terrain and lower speeds that you want to get more out of each push vs a full pedal stroke of road biking but I guess I'll be finding out for myself soon enough

  35. #35
    mtbr member
    Reputation:
    Join Date
    Dec 2012
    Posts
    11
    hmm 6'2" inseam what 34 or less? 180 vs 175 might not be noticeable, but at 6'6" and 36.5 inseam I'd take 180 any day over 175 and damn the strikes.

  36. #36
    some know me as mongo
    Reputation:
    Join Date
    Feb 2008
    Posts
    679
    I run both 180mm and 175mm cranks. I did notice the difference on road bike that I use to have but I cant say that I notice any difference on my mountain bikes. I bet I could if I have two identical bike (minus the crank length) and rode the same trail back to back but that would probably the only way to really tell.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •