User Tag List

Results 1 to 12 of 12

Thread: Chart for rim width / tire size?

  1. #1
    Join Date
    Jul 2014
    Location
    So Cal
    Posts
    83
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Chart for rim width / tire size?

    I'm wondering if there is chart out there that will give basic guidelines as to what rim width can handle what tire sizes? Something like internal rim width of 27mm-29mm will handle tires from 2.2-2.6... kinda of info.

    Thanks
    __________
    Eric Ruffing
    __________
    https://twitter.com/heartattackride

    Mindful Practitioner+Heart Attack Survivor+Plant Based Eater+Art Director+MA Psych Student+Ride Bikes+Boards…rarely all in the same day.

  2. #2
    Join Date
    Jun 2009
    Location
    New Hampshire
    Posts
    3,414
    Post Thanks / Like
    Mentioned
    1 Post(s)
    Tagged
    1 Thread(s)

    Default Re: Chart for rim width / tire size?

    Quote Originally Posted by heartattackrider View Post
    I'm wondering if there is chart out there that will give basic guidelines as to what rim width can handle what tire sizes? Something like internal rim width of 27mm-29mm will handle tires from 2.2-2.6... kinda of info.

    Thanks
    None that I know of but I my general rule of thumb is:

    2.4-2.6": Inner rim width in the 30-32mm range.

    2.6–2.8": Inner rim width in the 35mm range

    3.0": Inner rim widthi in the 40-45mm range.

    Cliff Notes:

    A good all purpose inner rim width for tire sizes in the 2.4-2.6" range is 30-35mm I'd say.
    Kristofer Henry : 44 BIKES : Made to Shred™
    www.44bikes.com · Flickr · Facebook · Instagram

  3. #3
    Join Date
    Aug 2011
    Location
    DURHAM, North Cackalacky
    Posts
    1,221
    Post Thanks / Like
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Chart for rim width / tire size?

    schwalbe-ETRTO-rim-and-tire-width-recommendation-chart.gif

    This one and others like it float around. Obviously it predates wide rim trends. So But what Kris said.
     

  4. #4
    Join Date
    Jul 2014
    Location
    So Cal
    Posts
    83
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Chart for rim width / tire size?

    Thank Kris. I appreciate the response.

    I had seen that one Zambenini also...definitely helped before the wider world of rims. :)
    __________
    Eric Ruffing
    __________
    https://twitter.com/heartattackride

    Mindful Practitioner+Heart Attack Survivor+Plant Based Eater+Art Director+MA Psych Student+Ride Bikes+Boards…rarely all in the same day.

  5. #5
    Join Date
    Sep 2011
    Location
    Middle GA
    Posts
    6,153
    Post Thanks / Like
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Chart for rim width / tire size?

    Quote Originally Posted by zambenini View Post
    schwalbe-ETRTO-rim-and-tire-width-recommendation-chart.gif

    This one and others like it float around. Obviously it predates wide rim trends. So But what Kris said.
    That is the ETRTO chart and it's waaaaaay out of date. According to that chart, a 21mm inner width rim (like the HED Belgium Plus and quite a few other modern road rims) can't take any tire smaller than a 35mm.

    I'll echo what Kris said. For a modern MTB, unless you're really watching weight or running skinny tires (like a 2.0"), 30-35mm is the sweet spot.

    Don't be afraid to mix widths too. On my MTBs I run a wider tire up front (2.4") and a bit narrower/lighter/faster 2.2" out back. I've got a set of WTB ASYM rims built up with the 29mm on the rear and 35mm up front, and it's a great combo.

    EDIT to add, also with these modern wide (and heavy and stiff) rims, don't be afraid to use some lighter gauge spokes to offset the rim weight penalty a bit. Even with less-stiff spokes you'll still end up with a stiff and fun to ride set of wheels.
    Last edited by dgaddis; 1 Week Ago at 09:20 AM.
    Dustin Gaddis
    www.MiddleGaEpic.com
    Why do people feel the need to list all of their bikes in their signature?

  6. #6
    Join Date
    Jun 2009
    Location
    New Hampshire
    Posts
    3,414
    Post Thanks / Like
    Mentioned
    1 Post(s)
    Tagged
    1 Thread(s)

    Default Re: Chart for rim width / tire size?

    Quote Originally Posted by heartattackrider View Post
    Thank Kris. I appreciate the response.

    I had seen that one Zambenini also...definitely helped before the wider world of rims. :)
    Sure thing.

    For the record, here's my own setups:

    29er: I'm running a 2.5 up front and a 2.4 out back mounted to Nox Farlow which have a 29mm internal rim width.
    27.5+: I'm running 2.8's front and rear mounted to Nox Kitsuma's which have a 36mm internal rim width.
    Kristofer Henry : 44 BIKES : Made to Shred™
    www.44bikes.com · Flickr · Facebook · Instagram

  7. #7
    Join Date
    Jun 2008
    Location
    Middle of the mitten
    Posts
    2,365
    Post Thanks / Like
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Chart for rim width / tire size?

    30mm inner rims
    27.5x 2.5 and 2.6 (even some 2.35s)
    29x2.4

    Been very happy with the setups.
     

  8. #8
    Join Date
    Aug 2008
    Location
    Flagstaff, Arizona
    Posts
    9,740
    Post Thanks / Like
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Chart for rim width / tire size?

    Smallest one that's left here in awhile would be I-29's and the smallest tire has been a 2.6 with possible intent of using 2.4's.

    A 2.8 will run fine on a I-29 if you like a round tire profile (which I do) and it also protects the sidewalls - I've been running a 2.5 on a rim with an outside measurement of 40mm for years now, and it's hard on the sidewalls, you have to run a DH tire on this set-up.

    I max out at 3.0" on the bikes I build, and I lace 35-40's for these.

    IMO beyond 3.0 tires you need to begin using "alternative" BB and axle spacing like 83mm BB's and 150+ rear hubs and to be fair, I'm not up to speed on this "standard" = I max out at "Boost"

    - Garro.
    Last edited by steve garro; 1 Week Ago at 11:35 AM.
    Steve Garro, Coconino Cycles.
    Frames & Bicycles built to measure and Custom wheels
    Hecho en Flagstaff, Arizona desde 2003
    www.coconinocycles.com
    www.coconinocycles.blogspot.com

  9. #9
    Join Date
    Jul 2014
    Location
    So Cal
    Posts
    83
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Chart for rim width / tire size?

    27.5+: I'm running 2.8's front and rear mounted to Nox Kitsuma's which have a 36mm internal rim width.
    This helps.
    Thanks for all the answers/info!
    __________
    Eric Ruffing
    __________
    https://twitter.com/heartattackride

    Mindful Practitioner+Heart Attack Survivor+Plant Based Eater+Art Director+MA Psych Student+Ride Bikes+Boards…rarely all in the same day.

  10. #10
    Join Date
    Sep 2011
    Location
    Middle GA
    Posts
    6,153
    Post Thanks / Like
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Chart for rim width / tire size?

    35mm is the sweet spot for plus size I think. It's wide enough to put a good profile on the tire, good sidewall protection, with a pretty significant weight savings over 40 or 45mm rims.
    Dustin Gaddis
    www.MiddleGaEpic.com
    Why do people feel the need to list all of their bikes in their signature?

  11. #11
    Join Date
    Mar 2013
    Posts
    291
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Chart for rim width / tire size?

    In what situation would you want a more rounded tire profile? terrain, rider weight, rising style? I don't which which I prefer. any reason to use a wider rim-to-tire ratio front or rear? for example, if I built two wheels with an i30 rims on the front and a i35 rear and use the same size tire, the front would be more rounded, correct?

    I have i25 rims with 2.2-2.35 tires at the moment, but I would like to move to fatter tires. probably nothing bigger than 29x2.5 though. 30-35 would probably be ideal for that tire size. might choose a slightly narrower one front or rear, based on theories anyone might share here.

    while we're on the topic- asym rims and boost hubs: any reason to chose and asym rim these days?
    Jonathan - Austin, TX
    A Thorn in Your Sidewall

  12. #12
    Join Date
    Sep 2011
    Location
    Middle GA
    Posts
    6,153
    Post Thanks / Like
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Chart for rim width / tire size?

    As to why you'd want a rounded tire profile:

    A lot of it preference. Some people like it, some don't, most can't tell much difference I reckon. Some folks report less traction when moving to a wider rim using the same tire as before, as the 'tread' flattens out the gaps between the knobs close up on one another a bit.

    All else equal a rounded tire likely rolls faster than a more squared off tire, I'd assume.

    Again....probably doesn't make a huge difference until you're really pushing right up to the limits of traction.

    From a practical standpoint, a more squared off tire typically means the sidewalls are further out and less shielded by the tread, so they're more likely to get cut.

    Boost + ASYM = a good thing IMO. A Boost wheel build with a center drilled rim is a bit better than a non-Boost as far as tension balance, but Boost + ASYM is even more balanced. As an example, using an I9 6-bolt rear hub here's how the NDS tension looks:
    stnd hub + center drilled rim = 63%
    stnd hub + asym rim = 87%
    boost hub + center drilled rim = 65%
    boost hub + asym rim = 88%

    That's using comparing a WTB KOM i29 29er vs an ASYM i29 29er rim. Of course how those numbers work out depends on the hub (some boost hubs have different flange diameters not just offsets) and just how 'asym' the rim is.

    If you're going to mix rim widths, I'd match them up with tire size, aka wider up front, narrower out back.

    The wider front gives better sidewall support to the wider front tire, and being the front tire you're less worried about the sidewall getting cut since the tire carries less weight and since you can steer it you don't often catch the sidewall on stuff on accident.

    The narrower rear helps protect the sidewalls a bit, and it's a bit less weight you have to 'spin up' through the pedals, and it better matches the narrower tire, assuming you like a bit skinnier tire in the back.
    Last edited by dgaddis; 1 Day Ago at 11:12 AM.
    Dustin Gaddis
    www.MiddleGaEpic.com
    Why do people feel the need to list all of their bikes in their signature?

Similar Threads

  1. Max rim width vs 40mm CX tire
    By d_douglas in forum General Discussion
    Replies: 11
    Last Post: 03-14-2018, 10:54 AM
  2. 27.5+ Rim Width and Tire Reccomendations
    By Tamu8104 in forum Mountain Bikes
    Replies: 28
    Last Post: 06-02-2017, 12:29 AM
  3. Tire width question
    By goldmine848 in forum VSalon Pro-Bicycle Tech
    Replies: 2
    Last Post: 05-11-2017, 09:10 AM
  4. Tire height & width on typical cross tire?
    By 54ny77 in forum General Discussion
    Replies: 5
    Last Post: 12-20-2009, 02:20 PM

Tags for this Thread

Bookmarks

Bookmarks

Posting Permissions

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