Advertise on Bikeforums.net



User Tag List

Results 1 to 11 of 11
  1. #1
    701
    701 is offline
    Newbie
    Join Date
    Dec 2011
    Posts
    4
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    451 wheels for Dahon mu p8?

    Hello folks,
    As part of my ongoing quest to improve my beloved mup8 I'm considering chancing the wheels from 406 to 451 rims.
    It's fairly major surgery, involving modifying the brakes and obviously new tyres.
    Has anyone tried this? Any thoughts about how significant a change that would be in terms of performance ?

  2. #2
    AEO
    AEO is offline
    Senior Member AEO's Avatar
    Join Date
    Jun 2007
    Location
    A Coffin Called Earth. or Toronto, ON
    My Bikes
    Bianchi, Miyata, Dahon, Rossin
    Posts
    12,245
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    ThorUSA sells brake extenders and 451 wheels.
    http://www.thorusa.com/accessories/wheels.htm
    They also sell 451 duranos.

    If you ask me, however, I would have to say 451 wheels don't make up for the loss in quality tire selection.
    I mean, for starters, you have the Durano in 20 x 1-1/8, Primo comet in 1-1/8 or 1-3/8... and well, nothing else.

    actually, looking into it further, you can even get Ultremo ZX tires, but the hard part would be finding a shop that doesn't sell them at MSRP.
    Last edited by AEO; 12-04-11 at 06:38 AM.
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
    http://sanfrancisco.ibtimes.com/arti...ger-photos.htm

  3. #3
    Senior Member
    Join Date
    May 2004
    Location
    Pacific Northwest
    My Bikes
    Too many....................
    Posts
    3,073
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There is also the option of more gearing with a front derailleur http://www.thorusa.com/accessories/special.htm and a crank set.
    Speed Uno
    Dawes Kingpin 2speed

  4. #4
    701
    701 is offline
    Newbie
    Join Date
    Dec 2011
    Posts
    4
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thank you for your quick replies,
    As my rides range further I am starting to feel the need for more gearing options, but I didn't know you could get A front derailleur hanger to fit the oversized mu frame. So that is surely an option I shall look into, I assume I'll need A new bottom bracket with a longer spindle to accommodate the extra chainring ?

    And what about tyres? I'm using the marathon racers that came stock with the bike and was wondering how much of an actual difference will I feel if I change to slicks (Panaracer minits, Kojaks?)
    Again, thanks for your input

  5. #5
    New usename ThorUSA brakemeister's Avatar
    Join Date
    Nov 2004
    Location
    Southern Illinois USA
    Posts
    2,469
    Mentioned
    0 Post(s)
    Tagged
    1 Thread(s)
    the derrailleur hanger comes with a small spacer which goes on the"fixed" right side of the bottom bracket. No need to get a new one.
    Thor

  6. #6
    701
    701 is offline
    Newbie
    Join Date
    Dec 2011
    Posts
    4
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks Thor,
    I guess that'll be next on upgrade list.
    BTW the aber halle stem is a great bit of kit,
    I now have drop bars on my mu p8 and can fine tune my riding position - great purchase, and pretty cheap too

  7. #7
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    570
    Mentioned
    31 Post(s)
    Tagged
    0 Thread(s)
    Know:the rim is 22.5, larger in radius, a bit more than 7/8"..

    a much shorter reach brake caliper may be in order ..

  8. #8
    New usename ThorUSA brakemeister's Avatar
    Join Date
    Nov 2004
    Location
    Southern Illinois USA
    Posts
    2,469
    Mentioned
    0 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by fietsbob View Post
    Know:the rim is 22.5, larger in radius, a bit more than 7/8"..

    a much shorter reach brake caliper may be in order ..
    if you wasnt to go caliper brakes we have them in stock as well .....
    sometimes I do surprise myself what exotic very special stuff we do have ...lol

    thor

  9. #9
    Senior Member
    Join Date
    Dec 2007
    Location
    Canada
    Posts
    898
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by 701 View Post
    Hello folks,
    As part of my ongoing quest to improve my beloved mup8 I'm considering chancing the wheels from 406 to 451 rims.
    It's fairly major surgery, involving modifying the brakes and obviously new tyres.
    Has anyone tried this? Any thoughts about how significant a change that would be in terms of performance ?
    Perhaps you can do another approach, because before you commit to 451 wheels, you need to be aware of one thing.

    Larger wheels shine when you use bigger gears. That's right, when you put on 451 wheels, you'll notice that you have about an inch or few inches gears higher. This is nice if you are a really strong rider. Bigger gears means you can go faster and roll better a bit I suppose. This assumes that you won't down shift to maintain your riding cadence. Unfortunately for most people, they do tend to down shift to maintain riding cadence. In the end, it's a zero sum game, meaning that you up the gear inches only to down shift to ride with lower gears resulting in the same speed. Of course, your wallet will be a bit lighter in the end.

    If you want to experiment with 451 wheels, may I suggest an intermediate solution instead?
    Why not try a pair of Big Apple 406 20" tires, assuming it fits your Mu P8. For no more than $70 a pair, you get a pair of larger wider monster tire. The resulting circumference on this tire on your normal 406 rim will result in a bigger diameter wheel when inflated correctly.

    Here's what I noticed with the Big Apples. You do go faster with these compared to the Stelvios with the same high gear I use on the Stelvios. Plus because it is a wider fatter tire, the ride comfort is spectacular (cushy and comfy). Higher pressure on smooth roads and 65psi on rough rural roads.
    When you are on the Big Apples, you will notice a slight loss in acceleration, because it is a heavier tire plus a larger tire means it takes more effort to turn compared to a smaller tire like the Stelvio or Durano.

    This way, you can be sure you are strong enough rider to justify those 451 wheels. Otherwise, 451 wheels look good, but will do you no good if you don't have the engine to take advantage of them. You don't need any brake extenders for this mod.

    Lastly, I had ridden the Bike Friday Pocket Pro extensively in the past and can relay some experiences with 451 wheels, which was why I experimented with Big Apples on the Mu SL and have found a happy medium. The last ride with my friends showed that I could keep up with their carbon Madones and Cannondales within reasons.

    Another thing I dislike about the 451 wheels is the limited tire selection than 406.

    Hope this helps.
    Last edited by pacificcyclist; 12-14-11 at 05:27 PM.
    Trek 5000 carbon road bike
    Masi Speciale CX touring bike
    Dahon Mu SL (performance hybrid road bike)
    Dahon Speed Duo (slow poker shopper or coffee getter bike)

  10. #10
    701
    701 is offline
    Newbie
    Join Date
    Dec 2011
    Posts
    4
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks all,
    Pacificcyclist - you've certainly given me food for thought, I will try big apples once I wear out my new Kojaks .
    Speaking of which ( and hijacking the thread while I'm at it )- I'm having a hell of a time trying to install the Kojaks on the rims, actually blistered my fingers with no results.
    Any advice from my fellow folder fiends?

  11. #11
    Senior Member
    Join Date
    Nov 2008
    Location
    Bay Area, Calif.
    Posts
    4,820
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    I'd also suggest staying with the 406 wheels. I had actually ordered my Bike Friday with 406s but ended up with a different model and 451 wheels due to time constraints of my trip. As others have mentioned, there are fewer tire choices in the 451 size. Given that I can ride just as fast on my Bike Friday as I can on my 700c road bike, the wheel size isn't a significant factor - especially such a small difference as between 406 and 451mm. Get some good 406 slick tires with supple sidewalls and the proper gearing and your bike should be at least as fast as it would be using 451 wheels.

    Hope I don't qualify as a "fellow fiend," but to install the Kojak tires:
    1) make sure that the tire bead is pressed down as far as possible into the center channel of the rim except in the last few inches where you're trying to get the bead over the rim edge
    2) a little soapy water on the edge of the rim helps lubricate it and lets the last bit of tire slip over the edge
    3) if it's still not working, try warming up the tire with a hair dryer or other gentle heater
    4) as long as you're careful not to nick or pinch the tube, use of tire levers (or even screwdrivers) will let you mount the tire without injury to your fingers - but generally steps 1-3 will suffice without the need for tools.
    Last edited by prathmann; 12-31-11 at 03:46 PM. Reason: typo

Posting Permissions

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