Results 1 to 20 of 20
  1. #1
    mtbr member
    Reputation:
    Join Date
    Sep 2011
    Posts
    114

    New question here. your maximum speed

    When you run on a flat tarmac how much is your maximum speed that you can get on your best cadence? And how much is your gear ratio?

    I got 33.1 km/h with 38/14 gear ratio and CST Copperhead tires.

    How much is yours?

  2. #2
    EX-RoadLice
    Reputation: Trailice's Avatar
    Join Date
    Oct 2009
    Posts
    35
    Just got clocked by radar at 16 mph with 33/18 @ about 120 rpm on a 29" with panaracer rampage with 20 psi.

  3. #3
    Just Ride
    Reputation: Cormac's Avatar
    Join Date
    Aug 2011
    Posts
    1,740
    I'm more concerned with how fast I can bomb when the terrain points down. Around here in Indiana, best I've gotten is 28. Not a lot of long downhill sadly.
    SS ==> Nut up or Shut up!

  4. #4
    mtbr member
    Reputation: Nakedbabytoes's Avatar
    Join Date
    Jul 2012
    Posts
    858
    Flatland pavement, 33 x 17 stock Karate Monkey 29er with Exiwolfs, 18mph before spinning out. But I am pedaling like a crazy woman to keep the drive engaged. Comfortable flatland speed is about 15mph. I am a runner, so my legs are too strong for my stock gearing. I need to change the rear to a 19.
    2010 Surly Conundrum
    2012 Pugsley
    2012 Felt Brougham
    2013 Salsa Colossal
    2013 All City Nature Boy
    2014 Big Dummy

  5. #5
    mtbr member
    Reputation:
    Join Date
    Sep 2011
    Posts
    114
    Quote Originally Posted by Nakedbabytoes View Post
    ..I need to change the rear to a 19.
    why you decide to change the rear with the bigger one? isn't it become much lighter for your legs?

  6. #6
    mtbr member
    Reputation: juan_speeder's Avatar
    Join Date
    May 2008
    Posts
    1,100
    I can touch 28mph at a stupid-high cadence, and I can cruise at 19 for a long time at a maintainable high cadence.

    34x19@29"
    www.seanhannity.com <=not what you think it is.

    Homeopathy is the Air Guitar of Medicine.

  7. #7
    mtbr member
    Reputation: Nakedbabytoes's Avatar
    Join Date
    Jul 2012
    Posts
    858
    Quote Originally Posted by cassava View Post
    why you decide to change the rear with the bigger one? isn't it become much lighter for your legs?
    Yup, I need a challenge Nah, I just mis wrote, that's all. Smaller rear or bigger crank ring is what I meant.
    2010 Surly Conundrum
    2012 Pugsley
    2012 Felt Brougham
    2013 Salsa Colossal
    2013 All City Nature Boy
    2014 Big Dummy

  8. #8
    A plethora of pinatas
    Reputation: mcoplea's Avatar
    Join Date
    Nov 2004
    Posts
    1,183
    Sheldon Brown's Gear Calculator has a great feature for this question. Sheldon Brown's Bicycle Gear Calculator

    You can select your gear combinations and then under Gear Units, select MPH @ a specific cadence. For example:

    Gear chart using MPH @ 120 RPM

    For 29 inch (nominal) tire with 175 mm cranks

    32 x 18 @ 120 RPM = 18.4 MPH

    Pretty cool!
    Marty

  9. #9
    mtbr member
    Reputation: jetboy23's Avatar
    Join Date
    Jun 2011
    Posts
    1,201
    I don't ride flat tarmac enough to ever gear for it. My gearing is for going up and down. I commonly reach 30-35mi/hr without even pedaling. And, i'm a slow poke.

  10. #10
    Just Ride
    Reputation: Cormac's Avatar
    Join Date
    Aug 2011
    Posts
    1,740
    Quote Originally Posted by jetboy23 View Post
    I don't ride flat tarmac enough to ever gear for it. My gearing is for going up and down. I commonly reach 30-35mi/hr without even pedaling. And, i'm a slow poke.
    Man, must be nice to have hills that let you get those kinds of speed going down. Though, I'm sure you pay for em on the climb! Gotta pay to play, right?
    SS ==> Nut up or Shut up!

  11. #11
    mtbr member
    Reputation:
    Join Date
    Sep 2009
    Posts
    57
    I can touch 21 km/h without high cadence, my bike is a 29er, with 32x20 and I am very happy

  12. #12
    Dive Bomber
    Reputation: jackspade's Avatar
    Join Date
    Jul 2010
    Posts
    741
    I got around 35-40kph on flat with 32x18 on 26. Tire CST cheyene 2.40 yes I am a hamster LOL.

    My normal speed is 28-33kph-ish, yes I like it spinning cadence like hamster.

  13. #13
    jl
    jl is offline
    climb
    Reputation: jl's Avatar
    Join Date
    Feb 2004
    Posts
    2,229
    I just got clocked at 14 mph. 32/20, igniters. Riding to work, no super crazy cadence.
    Ride On!

  14. #14
    mtbr member
    Reputation:
    Join Date
    Apr 2007
    Posts
    300
    Flats are for resting in between climbs

  15. #15
    mtbr member
    Reputation:
    Join Date
    Oct 2009
    Posts
    28
    low to mid 20s (22-23 mph) with 29" Rocket Ron @ 24psi and 175mm cranks turning 32X18 spinning like a mad man...

  16. #16
    mtbr member
    Reputation:
    Join Date
    Jan 2012
    Posts
    3,139

    your maximum speed

    Much faster than I can hike mostly.

  17. #17
    mtbr member
    Reputation:
    Join Date
    Nov 2013
    Posts
    28
    Just did an experiment on my commuter 700c SS with 44x16 gearing: 120 RPM gives me 43 km/h . Normal cruise speed on flats is a weak 80 RPM for 28 km/h, have to work it up to 90ish RPM.

    It is a cheap $250 bike so I bought two. The other one is 39x16, it gives me higher average speed on my 20 mile commute according to GPS, I guess I climb faster with the easier gearing.

    Need to harden the *** up!

  18. #18
    Clyde on a mission!
    Reputation:
    Join Date
    Dec 2011
    Posts
    669
    My top speed pedaling is actually on a slight climb. On my 29'er geared 32/18 I can hit 30 kmh (18.5 mph) when going up a very easy climb. When I try to do the same om flat ground the bike kinda runs away from me and I end up bouncing all over the place when doing those kinds of cadences - adding a tiny bit of resistance by going up a very easy climb keeps everything nicely in check and allows me to pedal faster.

    Still, going down hill I can go a lot faster but that's without pedaling..

  19. #19
    mtbr member
    Reputation: asphaltdude's Avatar
    Join Date
    Sep 2008
    Posts
    532
    Never tried on my SS (don't have a tacho on it) but on my road bike I once hit 180 rpm on 42/21.

    If I manage to do 160 rpm on my Ogre at 36/19 that would make 42 km/h or 26 mph.

    Hmmmm...maybe I should try this out.
    Ride more!

  20. #20
    mtbr member
    Reputation:
    Join Date
    Jan 2012
    Posts
    3,139

    your maximum speed

    Since I live in the Bay Area, my maximum speed is 14.99 mph.

Similar Threads

  1. Maximum Stoke!
    By CLAW in forum Passion
    Replies: 15
    Last Post: 10-04-2012, 09:54 AM
  2. Maximum float.
    By DavidJohn in forum Fat Bikes
    Replies: 0
    Last Post: 08-25-2012, 10:37 AM
  3. Maximum Travel ?????
    By dflash in forum Specialized
    Replies: 1
    Last Post: 08-23-2012, 04:27 AM
  4. Maximum spacers?
    By Warners in forum Shocks and Suspension
    Replies: 12
    Last Post: 08-16-2012, 11:26 AM
  5. does anybody know the maximum
    By maxxxsta in forum Beginner's Corner
    Replies: 14
    Last Post: 02-16-2011, 10:43 PM

Posting Permissions

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