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  1. #1
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    11-28 tooth freewheels now available

    Hi guys. This is kind of a specific thread, but perhaps it applies to more than the Downtube Nova. If you don't want to read my story leading up to this result, just skip down to the bottom.

    I recently purchased a downtube Nova. It's great but I'd like it to be faster. The easiest thing I could see would be replacing the freewheel for one with less teeth on the small cogs(s) (the original freewheel is 14-28.)

    So I wanted one with 11 teeth on the small cog. They're really hard to find, really really hard. But comcycle-usa sold a model with 11-34 teeth. The brand is DNP and it's pretty much the only one I can find. I ordered it, but there was a big problem, literally. The 34 tooth cog was too big! It would get in the way of the derailleur if it was installed.

    Now I was troubled with trying to find a model with a big cog that didn't have 34 teeth. I live in Florida so I didn't care how few teeth the biggest cog had; I just wanted to make sure it wouldn't get in the way of the derailleur. So I called comcycle and it turns out they have 11-28 tooth models in stock, just not on their website.

    -------

    Well, now they're on their website. You can see it on
    http://www.comcycle-usa.com/Ebike-an...rts-31279.aspx


    I have ordered one and will soon be getting it installed and seeing if it works good or not. I will update this post with the results. Just wanted to share the news in case anyone else wants to give it a shot.

  2. #2
    Senior Member rcschafer's Avatar
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    There's not a lot of feedback on the DNP freewheels but at least one poster complained of poor machining. You might want to keep an eye out on eBay for a used/NOS Shimano Mega 7; those are quite scarce but highly spoken of.

    I use the Shimano 11-34 on my touring bike with a 48-34 compact double and love love love it. Too bad they're not more available.

  3. #3
    Senior Member kamtsa's Avatar
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    Quote Originally Posted by jgh7 View Post
    ... But comcycle-usa sold a model with 11-34 teeth. The brand is DNP and it's pretty much the only one I can find. I ordered it, but there was a big problem, literally. The 34 tooth cog was too big! It would get in the way of the derailleur if it was installed.
    I was thinking installing this 14-34 on our Nova http://amzn.com/B003RLNOKC to have lower gearing than the stock.

    Have you tried to adjust the B screw? Anything else can be done to install a 34? Will replacing the derailleur help?
    Happier than a camel on wednesday.

  4. #4
    Senior Member rcschafer's Avatar
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    Looks like the Nova comes stock with a Shimano RD-TZ50, which can only handle 28T max. To get a 34T in there you'd have to switch to an RD-TX71, -TX51 or -TX31.

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    Senior Member kamtsa's Avatar
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    Quote Originally Posted by rcschafer View Post
    Looks like the Nova comes stock with a Shimano RD-TZ50, which can only handle 28T max. To get a 34T in there you'd have to switch to an RD-TX71, -TX51 or -TX31.
    Thanks rcschafer. Amazon does not have RD-TZ31/51/71 but has Tourney TX35/55/75. Will these also work with 34 and same shifter?
    Happier than a camel on wednesday.

  6. #6
    Bicycle Repair Man !!! Sixty Fiver's Avatar
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    The 11-x freewheels were a brilliant idea on Shimano's part... just scored an 11-34 for touring and wish they would still make the 11-28 which is pretty much ideal.

  7. #7
    Senior Member himespau's Avatar
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    Quote Originally Posted by Sixty Fiver View Post
    The 11-x freewheels were a brilliant idea on Shimano's part... just scored an 11-34 for touring and wish they would still make the 11-28 which is pretty much ideal.
    Yeah, I wish they still made them. I understand there's not a huge market for freewheels these days, but the stories of bad machining have scared me away from the DNP's and I just can't find any of the old shimano ones.
    Punctuation is important. It's the difference between "I helped my uncle, Jack, off a horse" and "I helped my uncle Jack off a horse"


  8. #8
    CX, MTB, Road, SS, BMX Dion's Avatar
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    Guys, there are a ton of 11-28's, 11-32's, 11-34's on Universal Cycles. They're not rare!

    EDIT: Never mind, those are cassettes.

  9. #9
    Senior Member skycomag's Avatar
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    i don't if this will help, but i found a 11-32 freewheel@ http://www.ebikessf.com/node/154

    can't sleep so i search ebay and found these:http://www.ebay.com/sch/i.html?_nkw=....c0.m270.l1313

    http://www.ebay.com/sch/i.html?_nkw=....c0.m270.l1313
    Last edited by skycomag; 10-05-11 at 11:47 PM. Reason: more info

  10. #10
    Senior Member rcschafer's Avatar
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    Quote Originally Posted by kamtsa View Post
    Thanks rcschafer. Amazon does not have RD-TZ31/51/71 but has Tourney TX35/55/75. Will these also work with 34 and same shifter?
    The Amazon page for each has the max sprocket for each in the Product Description; each of the three you listed will handle 34T. Not sure if the shifter will work but they're all from the Tourney line so I wouldn't think there'd be any problem.

    Oh, and here's the listing of tech docs.
    Last edited by rcschafer; 10-06-11 at 12:02 AM. Reason: Fixed typo.

  11. #11
    Senior Member kamtsa's Avatar
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    Quote Originally Posted by rcschafer View Post
    The Amazon page for each has the max sprocket for each in the Product Description; each of the three you listed will handle 34T.
    Awosome! Thanks rcschafer.
    Happier than a camel on wednesday.

  12. #12
    Senior Member skycomag's Avatar
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    i just pick up either a 11-34 0r 11-32 to replace my 14-34 f/w.i gave him 2 choice j.i.c. pick it up for 34.00 free s/h.
    there is only one left on eb-y.

    http://www.ebay.com/itm/290605707773...84.m1423.l2649

  13. #13
    Senior Member kamtsa's Avatar
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    Just ordered a 7sp 11-32T and a Shimano TX35 for our Nova. Will see how this goes. Thanks everybody for the info.
    Happier than a camel on wednesday.

  14. #14
    Senior Member kamtsa's Avatar
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    Got today the TX35 derailleur. The end to be attached to the frame seems to be different than the stock Nova derailleur (TZ50). The picture below shows the original derailleur (installed) and the Tx35 next to it. Is the TX35 compatible with the Nova? If so, what is the trick to install it?

    Thanks,

    K.

    IMG_20111008_174636.jpg

    IMG_20111008_174701.jpg

    Edit: I am seeing here a TX35 with a different hanger style. Is this the one that will fit a Nova?

    http://www.allez-bid.com/store/Rear_..._TX35_7_speeds

    http://www.niagaracycle.com/advanced...?keywords=tx35
    Last edited by kamtsa; 10-09-11 at 05:27 AM.
    Happier than a camel on wednesday.

  15. #15
    jur
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    What you have is a derailer meant for bike frames without a derailer hanger. That claw goes under the axle nut. There is an additional hole in the frame where the little bolt (which looks like a bird's eye in the pic) screws into to prevent rotation when tightening the axle nut.
    My folding bike photo essays www.dekter.net/

  16. #16
    Senior Member kamtsa's Avatar
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    Quote Originally Posted by jur View Post
    What you have is a derailer meant for bike frames without a derailer hanger. That claw goes under the axle nut. There is an additional hole in the frame where the little bolt (which looks like a bird's eye in the pic) screws into to prevent rotation when tightening the axle nut.
    This explains it. Thanks Jur. I will order the other kind then.

    It would be nice if Shimano would given different product numbers to these two incompatible products e.g. TX35A and TX35B.
    Happier than a camel on wednesday.

  17. #17
    Senior Member kamtsa's Avatar
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    A quick followup, got the Shimano TX35 derailleur (the non claw style) and a 7speed 11-32T NDP freewheel (from http://sdelectricbike.com/Accessories.html ). They fit the Nova and the existing chain and shifter well. High gear is now 22% higher and low gear is now 14% lower). Took it to a short test ride and so far am happy with the results.

    Notes:
    1. The slots in the NDP freewheel start deeper than the Shimano freewheel which makes Park Tool FR-1 too short to remove it. Got a Long Yih long remover from here http://sdelectricbike.com/Accessories.html

    2. The cogs of the NDP freewheel are not perfectly orthogonal (90 degree) to the axle and wobble right and left as the wheel turns. This is easily noticeable when you look at them but so far did did not cause shifting issues. Am not sure if this is intentional (to facilitate shifting?), general NDP low quality, or just a one of a kind lemon. If this will be a problem I will switch to Shimano 14-34T.

    Thanks everybody for the info

    Last edited by kamtsa; 10-14-11 at 06:51 PM.
    Happier than a camel on wednesday.

  18. #18
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    Hi all. Just wanted to give you an update.

    My 11-28tooth DNP freewheel from comcycleusa came in. I went to the bike shop and had it put on my Nova today. It actually took them quite a bit of adjusting to calibrate it to run smoothly. Unless you really know what your doing when it comes to freewheels and gear adjustments, I would recommend playing it safe and having this installed at a bike shop (they only charged me 6 bucks).

    I tested it out very shortly (just on a sidewalk outside the shop about 50 yards long). I must say there is a huge difference! It literally feels like a different bike, a powerful one. I can now stand up and put my whole body weight into each pedal to pick up a ton of speed. I couldn't do that before because there simply wasn't enough resistance on the highest gear to do it smoothly. I am very happy with the results so far. To be honest, it feels like a real bike now rather than that sort of toy bike feeling from pedaling too much and not getting enough speed.

    But the most important question is whether it will last or screw up somehow. I will post another update at the end of the week to let you all know.

  19. #19
    $ sudo shift sudoshift's Avatar
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    Quote Originally Posted by jgh7 View Post
    Hi all. Just wanted to give you an update.

    My 11-28tooth DNP freewheel from comcycleusa came in. I went to the bike shop and had it put on my Nova today. It actually took them quite a bit of adjusting to calibrate it to run smoothly. Unless you really know what your doing when it comes to freewheels and gear adjustments, I would recommend playing it safe and having this installed at a bike shop (they only charged me 6 bucks).

    I tested it out very shortly (just on a sidewalk outside the shop about 50 yards long). I must say there is a huge difference! It literally feels like a different bike, a powerful one. I can now stand up and put my whole body weight into each pedal to pick up a ton of speed. I couldn't do that before because there simply wasn't enough resistance on the highest gear to do it smoothly. I am very happy with the results so far. To be honest, it feels like a real bike now rather than that sort of toy bike feeling from pedaling too much and not getting enough speed.

    But the most important question is whether it will last or screw up somehow. I will post another update at the end of the week to let you all know.
    I have been looking for a 7-speed 11-28T freewheel as well to replace my 14-28T. I know getting a new hub and slapping on a cassette is ideal but I want to simplify with a freewheel darnit.

    I'll be ordering one as well and having the bike shop install it along with a new chain. Goodness knows I need a higher gear on my 20" folder. I dislike spinning out currently.

    Thanks so much for the find. Worse comes to worse I'll call the wifey to pick me up in an event of DNP failure.
    david@bikeforums:/sudoshift$ | Call me a "hipster" or an "UrbanCyclist" but I just like to ride bikes
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  20. #20
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    I was going to install one on my Downtube Nova but then ended up picking up a Dahon Speed D7. My lady rides the Downtube now and doesn't care to have higher gearing. Any Canadians want a brand new 11-28T freewheel with a freewheel removal tool drop me a line I'm in Canada.

    I don't know why but the Nova just accelerates faster and is more nimble. I find it small me for me though. I'm 6' tall with 33" inseam. The seat post was extended out beyond the Max mark and that's something I don't want to do....fits the lady well though. She's 5'8".

  21. #21
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    Update:

    There's an unresolvable issue with my DNP 11-28tooth freewheel. The 2nd smallest gear (with 13 teeth) isn't properly spaced between the other gears. The result is more of an annoyance than anything. When I pedal really hard, it will slip off the gear onto the 11 tooth gear. It stays on the gear when I pedal normally on it, so it basically just happens when I try to heavily accelerate on it. I've gone to 2 bike shops and they both concluded that it's a problem with the freewheel.

    All the other gears work fine. I'm going to keep the freewheel on since I still prefer it over my slower previous freewheel that came stock with the Nova. Unfortunately I must conclude that the quality of the DNP freewheel is questionable. I'm not sure if it was a fluke for me, or if others have the same issue. I venture to say that all of them will have this problem since the issue was not with imperfections in the teeth but with the actual core of the freewheel not spacing the cogs properly.

  22. #22
    $ sudo shift sudoshift's Avatar
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    That's not what I wanted to hear, even so a 11T freewheel is coming from there. I shall post my results. Planning to have a shop install it on my 20" folder along with a new chain.

    Having 6th gear slip doesn't sound too bad, but we'll see.
    david@bikeforums:/sudoshift$ | Call me a "hipster" or an "UrbanCyclist" but I just like to ride bikes
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  23. #23
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    Any update on this? How are the DNP's holding up? I'm dying to find a Shimano 11-28t freewheel.

  24. #24
    Senior Member Bill Fold's Avatar
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    Quote Originally Posted by fitftw View Post
    Any update on this? How are the DNP's holding up? I'm dying to find a Shimano 11-28t freewheel.
    My DNP 11-28 has worked fine.
    2007 Montague MX - road conversion
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  25. #25
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    Quote Originally Posted by Bill Fold View Post
    My DNP 11-28 has worked fine.
    Glad to hear! I might buy both the DNP 11-28 and Shimano 13-28 and see which one I like more, and return the other one.

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