Advertise on Bikeforums.net



User Tag List

Page 1 of 2 12 LastLast
Results 1 to 25 of 30
  1. #1
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Good gearing for rollers (high cadence)

    I'm buying a set of rollers next month, and will be purchasing an ultra cheap "track bike" ($75) for sole use with the rollers. I already have a trainer setup for doing resistance and sprint intervals, but wanted to use rollers specifically for improving high cadence form/aerobic condition on alternate days.
    I'm thinking a very agile gearing will force me to do high rpm, and eventually improve my form on descents/all out sprints.
    What gearing is too "agile" for rollers? I understand that part of the physics behind balancing on rollers is spinning your wheel, so i don't want it to be so low that the rollers are rendered useless, but i don't want it to be too high as to offer any resistance. I don't have experience on rollers w/a low gear ratio, so i'm kinda clueless as to how much the lower ratio will inhibit effective rolling. My TT bike is currently in pieces, so i'm thinking a good recommendation is my best bet to avoid swapping out too many chains/chainrings (time/money).

    Anyone with experience have a suggestion?
    Last edited by sp00ki; 01-14-08 at 11:01 AM.
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  2. #2
    im just better than you
    Join Date
    Jan 2006
    Location
    milwaukee
    My Bikes
    2 white custom track frames
    Posts
    203
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    gear ratio doesnt really matter on rollers. there is no resistance so you can get to a high rpm no matter what. if you are really concerned with it get a road bike and play around with the all the gear ratios that are on it. that way you dont have to keep switching your rings and cogs on your track bike.

  3. #3
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by lumenredundas View Post
    gear ratio doesnt really matter on rollers. there is no resistance so you can get to a high rpm no matter what. if you are really concerned with it get a road bike and play around with the all the gear ratios that are on it. that way you dont have to keep switching your rings and cogs on your track bike.
    I could, but like i said-- my tt bike is in pieces (some of which i no longer have, i'm building it back up atm). I suppose i could try to find someone my size with a roadbike who'd let me borrow it, but the likelyhood of that happenning seems slim-ish.

    So you feel that riding (for instance) 47/14 will offer no more resistance than riding 42/16 (on rollers)?
    Can you possibly explain the physics behind how they work? I've only used rollers with a single ratio, and haven't spent enough time on them to figure out the science behind why they work (i was under the impression that the rate of wheel spin added to the stability and was the basis of their being feasible).
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  4. #4
    F'ing A shasta's Avatar
    Join Date
    Oct 2007
    Location
    SJ
    My Bikes
    08 tommaso augusta, 88 specialized sirrus, random cruisers and stuff
    Posts
    321
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Have you ever tried spinning a wheel while you hold it by the axle? If you try to change its axis of rotation from vertical to horizontal it will fight you. The faster the wheel spin the wheel the more it fights you. When you are on the rollers this force helps the bike stay vertical.

    I'm sure there is a fancy name for this principle but I don't know what it is. Gyroscope?
    ride for fun

  5. #5
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yes, that's the impression i was under.
    So assuming that's the case, how low a gearing is too low? Based on a discussion in a different subforum, i'm thinking 41/17 will be good start for what i'm looking for.
    I'll probably go lower as my form at higher cadences improves.
    Last edited by sp00ki; 01-14-08 at 01:01 PM.
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  6. #6
    Super Senior Member
    Join Date
    Jul 2007
    Location
    Brooklyn
    My Bikes
    Track Bike
    Posts
    82
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It would depend on how big the radius of the roller wheels is. Probably you are fine with that gearing though.

  7. #7
    F'ing A shasta's Avatar
    Join Date
    Oct 2007
    Location
    SJ
    My Bikes
    08 tommaso augusta, 88 specialized sirrus, random cruisers and stuff
    Posts
    321
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I just asked my friend who actually owns rollers and he says "If you are not experienced at riding on rollers you need to have a gear ratio over 3, or you need to put it in the hallway so you can grab the wall before you fall over"

    I would just stick with your gearing and put the rollers near something you can grab onto just in case.
    ride for fun

  8. #8
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There are two support beams in my house just wide enough for the rollers that i plan on using until i'm comfortable. I've used rollers before, so i know what to expect.

    Thx for the advice
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  9. #9
    Team Beer Cynikal's Avatar
    Join Date
    Apr 2004
    Location
    Sacramento CA
    My Bikes
    Too Many
    Posts
    5,758
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I assume that a larger gearing (read go faster) would be better for rollers. This should increase the gyroscopic forces keeping up upright. As I said, this is an assumption. I've only ridden rollers once.

  10. #10
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    agreed. that's why i'm looking for lower gearing-- to "force" myself to keep a higher cadence, which would in turn "teach" me better form at higher rpms. i use a trainer for intervals and resistance training; the rollers would be offering me something completely different altogether.
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  11. #11
    Senior_Member2 diff_lock2's Avatar
    Join Date
    Apr 2006
    Location
    Finlando NOT: Orlando, Fl
    My Bikes
    Beater + Nishiki Bigfoot X-29
    Posts
    1,694
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You could ride outside with 60 gear inches...

  12. #12
    Senior Member
    Join Date
    Nov 2004
    Posts
    2,544
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by shasta View Post
    Have you ever tried spinning a wheel while you hold it by the axle? If you try to change its axis of rotation from vertical to horizontal it will fight you. The faster the wheel spin the wheel the more it fights you. When you are on the rollers this force helps the bike stay vertical.

    I'm sure there is a fancy name for this principle but I don't know what it is. Gyroscope?
    It's called precession (often called gyroscopic force or gyroscopic stability). Precession actually isn't necessary to keep a bike upright on the road but on rollers I imagine it is.

  13. #13
    Spawn of Satan
    Join Date
    Mar 2003
    Location
    Grand Rapids, Michigan, USA
    Posts
    763
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by sp00ki View Post
    agreed. that's why i'm looking for lower gearing-- to "force" myself to keep a higher cadence, which would in turn "teach" me better form at higher rpms. i use a trainer for intervals and resistance training; the rollers would be offering me something completely different altogether.

    This is a great way to use rollers in the winter months.

    The gear you are looking for depends on you mostly. What kind of shape are you in? What is your average speed when you are in shape and during the winter months.

  14. #14
    Senior Member
    Join Date
    Nov 2005
    Location
    Denver
    My Bikes
    '06 Six13 DA, 180s, 140 0 stack stem, KEOs: MTB is SC Superlight XT/SRAM/Avid Jucy/F100x
    Posts
    243
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    it totally depends upon which rollers you get - and how much air pressure you're running.

    Kreitler dyno-mytes are a serious workout for anyone - w/o a Killer Headwind. Dyno-lytes aren't as tough as the 'mytes' but still will give you as good of a workout as you want - especially if you're running 25c or fatter tires. The big Kreitler drums offer little resistance, and along w/ a brand-x roller set, you can spin out any gear.

  15. #15
    Senior Member
    Join Date
    Jan 2005
    Posts
    1,299
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Jet-man View Post
    it totally depends upon which rollers you get - and how much air pressure you're running.

    Kreitler dyno-mytes are a serious workout for anyone - w/o a Killer Headwind. Dyno-lytes aren't as tough as the 'mytes' but still will give you as good of a workout as you want - especially if you're running 25c or fatter tires. The big Kreitler drums offer little resistance, and along w/ a brand-x roller set, you can spin out any gear.
    amen.

    the widely repeated rumor that 'rollers offer no resistance' (a la lumenredundas) is bull****. the only point of reference i can offer is that 48x17 on 700x23 is plenty of gear on 3" rollers (dynolytes). you will not spin this gear on these rollers at a high cadence for any length of time. promise.

    OP, how big are the rollers? is there any sort of resistance unit?

  16. #16
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Not sure, i wasn't aware of different diameters=more/less resistance.
    Since i use the trainer for resistance training (intervals, mainly) i'm looking to use the rollers strictly for cadence/form/aerobics training. I want something with a lower resistance in this case. I was trying to achieve this with lower gearing, but i suppose a larger drum diameter is what i'm after.
    i was going to buy this:
    http://www.performancebike.com/shop/...tegory_ID=4121
    c/nc?
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  17. #17
    Senior Member nathbdp's Avatar
    Join Date
    Nov 2006
    Posts
    624
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    rollers are not for resistance, they are for cardio and form. get a trainer for resistance.

  18. #18
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    i'm totally hacking you over the internet right now.
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  19. #19
    *****es love tarck kemmer's Avatar
    Join Date
    Apr 2006
    Location
    Sandy, UT
    My Bikes
    so many
    Posts
    3,318
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by nathbdp View Post
    rollers are not for resistance, they are for cardio and form. get a trainer for resistance.
    that's what he just said.

  20. #20
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    don't, it's a trap!
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  21. #21
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    but seriously, pls recommend some large diameter jams.
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  22. #22
    Senior Member Duke of Kent's Avatar
    Join Date
    Jul 2005
    Location
    Upstate NY
    My Bikes
    Focus Raven 29er, Santa Cruz Blur LTc
    Posts
    4,568
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I can drop my road bike down into the 53x12 and do intervals at 320 watts at around 110rpm., with the resistance unit NOT engaged.

    Obviously, you CAN do intervals on rollers. Anyone who says you can't is full of it.
    "If a non personal post makes you feel as if you've been attacked, maybe the problem IS you."

  23. #23
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    can you at least kinda read the thread before posting?
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  24. #24
    Senior Member
    Join Date
    Nov 2004
    Location
    Pittsburgh!
    My Bikes
    Track bike, road fixed, cross fixed, two single speed mountain.
    Posts
    311
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I flip my track bikes over to their track gear on rollers. From 49x18 on the street to 49x16 on the rollers.

  25. #25
    Senior Member Duke of Kent's Avatar
    Join Date
    Jul 2005
    Location
    Upstate NY
    My Bikes
    Focus Raven 29er, Santa Cruz Blur LTc
    Posts
    4,568
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by sp00ki View Post
    can you at least kinda read the thread before posting?
    My point was that you need to OVERGEAR for the rollers, not undergear for them to simulate road conditions.

    Otherwise you aren't training your legs to deal with the loads associated with riding outdoors. A high cadence means nothing if you can't deal with real life riding scenarios.
    "If a non personal post makes you feel as if you've been attacked, maybe the problem IS you."

Page 1 of 2 12 LastLast

Posting Permissions

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