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  1. #1
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    Nobby Nic 27.5x2.6 numbers

    Just got a pair of Evo, TL, Pacestar, Snakeskin.
    Mounted on 23 mm internal width by 24.0 mm external height rims on a Yeti SB5c with 160 Pike fork.

    Bead to bead out of the box was 161.5 mm. A bit disappointing, but they stretch.
    One tire weighed in at 770 gms, the other at 780. Claimed weight is 810.

    Initially, mounted at 45 psi (the rated max), the total height rim+tire was 80.70 mm. Initial width was 57.62 mm for both tread and carcass.

    After sitting overnight at 45 psi, I reduced the pressure to 16 psi to remeasure.

    At 16 psi, the tire measures:
    Total height rim+tire is 83.62 mm.
    Tread width 63.17 mm (2.49")
    Carcass width 61.45 mm (2.42")

    They fit inside the rear and front easily on this bike.

    I expect they will stretch some more, but at this point I'd call them an honest 2.5" tire. They are bigger than a 26x2.35 Magic Mary that has had a month to stretch out and is pretty big.

    The front is at 16 psi. They feel surprisingly supportive at this pressure (like an Ardent at 20 psi, about) with no indication that fold over will be an issue, even on these relatively narrow rims without the more supportive Apex sidewall.

    We'll see! I just got back from 4 days in Moab....sure wish I'd had them for that.

  2. #2
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    1) I appreciate your findings but 2.6 tires on a 23mm rim? Are you nuts?
    Buy an adequate 35mm wheelset and report back ASAP! (I'm eyeballing the same tires)

    2) wrong forum. The 27.5 forum is just meant as a collective trash bin for all these geniuses who didn't find are more meaningful forum to post their threads that have already been discusses before.

    Highly complicated, computerised navigational techniques (Mouse klicking, sometimes even scrolling) are needed to successfully navigate to the wheels and tires forum. You'll actually find some existing 2.6 threads right there but nevermind...

  3. #3
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    1) I am nuts. I even once took an F-16N to 67,000 feet when the service ceiling was 50,000 feet...CRAZY! However, for years I ran 2.35 and 2.4" tires on 17 mm internals. I'm not buying in to the need to go way bigger when I'm increasing the size by a measly 0.1 or 0.2".
    2) I'll just have to live with myself for posting to the wrong forum. Use the info, or don't.

  4. #4
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    mhmm I cannot decide if 2.4 on a 17mm rim is worse than 2.6 on a 23mm...

    How about 2.4 on the 24mm and 2.6 on the 17mm, with that you'd have at least one good wheelset.

  5. #5
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    Mhmm I can't decide if I care what you think. Oh, wait....
    What are you, the 27.5 AND rim width hall monitor?

  6. #6
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    Yeah I dont understand what these go as big as you can just because you can people are adding to the koolaid theyre drinking.
    The only reason to go over 30mm internal width rims is to run legit plus size tires, 2.8 or bigger, specifically made for wide rims.
    Even the companies themselves have said that these new offerings at 2.5, 2.6 are not specifically plus tires or made specifically to fit plus tire rims.
    I have 2.5 wide trail Maxxis on Arch MK3 rims, 26mm width and they run just as good or better on this set up than on my WTB i29 rims.
    No discernible advantage of having very wide rims unless actually running giant plus size tires. Anything around 25mm width seems to be the sweet spot, even wheel and tire manufacturers who test all this shit before actually spending the money to make the products agree.

  7. #7
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    Which Sb5? The 2017 or the older version?

  8. #8
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    Oh yeah and props MSU Alum, for railing that F-16 and pushing it to the limit. Sick dude!

  9. #9
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    I have the 29er version mounted on an Arc Plus 45 rim and will post the measurements if that doesn't cause the thread to implode.
    GRAVELBIKE.COM - ride everything

  10. #10
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    Since 2.6 is between plus and plain size, I'd think this could go in either this or the plus forum. Mounted on narrow rims, they are probably more appropriate here. I'd probably go with a 30mm internal myself, but I'm due for a wheel rebuild anyway, so it wouldn't be a hardship for me to get wider rims. I think a NN 2.6 would be fantastic on the front of my 5010! So thanks for posting, MSU Alum! (which MSU are you alum'd from? I alum'd from the one in Michigan, class of 1984. And I know "alum'd" ain't proper usage- I'm using it for fun. Same for "ain't.")
    Last edited by SteveF; 04-13-2017 at 07:36 AM.

  11. #11
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    I've been curious about the 2.6 NN's. I'm running a 2.35 Hans Dampf and it measures out to 2.4 at ~18psi on a 29mm IW rim. Wondering if there is enough of a difference to switch.

  12. #12
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    Hi Does anyone have a total wheel tire height with these mounted on ~30ID rim. I am trying look at bottom bracket drop, Thanks

  13. #13
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    Quote Originally Posted by SteveF View Post
    Since 2.6 is between plus and plain size, I'd think this could go in either this or the plus forum. Mounted on narrow rims, they are probably more appropriate here. I'd probably go with a 30mm internal myself, but I'm due for a wheel rebuild anyway, so it wouldn't be a hardship for me to get wider rims. I think a NN 2.6 would be fantastic on the front of my 5010! So thanks for posting, MSU Alum! (which MSU are you alum'd from? I alum'd from the one in Michigan, class of 1984. And I know "alum'd" ain't proper usage- I'm using it for fun. Same for "ain't.")
    Montana, for me.
    BTW, I'm currently running mine on 35 mm id Ibis 742's.
    My wife's Rocket Rons are on the Ibis 735 at 29mm.

  14. #14
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    Quote Originally Posted by lucythefin View Post
    Yeah I dont understand what these go as big as you can just because you can people are adding to the koolaid theyre drinking.
    The only reason to go over 30mm internal width rims is to run legit plus size tires, 2.8 or bigger, specifically made for wide rims.
    Even the companies themselves have said that these new offerings at 2.5, 2.6 are not specifically plus tires or made specifically to fit plus tire rims.
    I have 2.5 wide trail Maxxis on Arch MK3 rims, 26mm width and they run just as good or better on this set up than on my WTB i29 rims.
    No discernible advantage of having very wide rims unless actually running giant plus size tires. Anything around 25mm width seems to be the sweet spot, even wheel and tire manufacturers who test all this shit before actually spending the money to make the products agree.
    IDK about the Nobby Nic's, but Maxxis Wide Trail tires are specifically recommended for 30-36 ID rims. The NN's would be fine from 26-30, and prob pretty good at around 23. I wouldn't put ANYTHING on a 36IW rim except for 2.8-3.0, and the mentioned Maxxis Wide Trails that are from 2.4-2.6 IIRC.
    You can't buy happiness. But you can buy a bike. And that's pretty close.

  15. #15
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    Quote Originally Posted by MSU Alum View Post
    Montana, for me.
    BTW, I'm currently running mine on 35 mm id Ibis 742's.
    My wife's Rocket Rons are on the Ibis 735 at 29mm.
    Montana, nice! I cycled through years ago on a ride across the U.S. and it's a beautiful state.

    I'd love to know how your tires measure on the 35 and 29mm rims if you have a chance to measure the width/height...

  16. #16
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    Quote Originally Posted by SteveF View Post
    Montana, nice! I cycled through years ago on a ride across the U.S. and it's a beautiful state.

    I'd love to know how your tires measure on the 35 and 29mm rims if you have a chance to measure the width/height...
    The measurements, Rocket Rons SS, TL, Pacestar at 20 psi.
    Width: 2.59" on both
    Height of exposed tire: 2.48 on the 735 (29) and 2.35 on the 742 (35)

  17. #17
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    Quote Originally Posted by BmanInTheD View Post
    IDK about the Nobby Nic's, but Maxxis Wide Trail tires are specifically recommended for 30-36 ID rims. The NN's would be fine from 26-30, and prob pretty good at around 23. I wouldn't put ANYTHING on a 36IW rim except for 2.8-3.0, and the mentioned Maxxis Wide Trails that are from 2.4-2.6 IIRC.
    Maxxis site: "WT tires are optimized for a 35 mm inner width rim", but are proven to work with a range of 30-35mm.
    The 2.6" worked just fine on 23mm rims, but on 29 and 35mm rims you can run low pressures if you want and the cornering knobs engage just a little faster on wider rims. This is all picking fly shit out of pepper. The differences are very small except in the ability to run low pressure due to the increase in sidewall support. It wouldn't surprise me though, if manufacturers followed Maxxis and started designing treads for 35mm rims, at least from a marketing standpoint. I will say, since I've gone to the 35mm rim, 2.6" tires and low pressure, I've managed 7 PR's this summer, on 40-60 minute climbs I've tracked for 15+ years, (and I'm now 65) so I'm sold.
    But the range of tire and rim combo's that would work for different people is pretty big....just don't be prejudiced against trying them.
    Last edited by MSU Alum; 09-13-2017 at 01:24 PM.

  18. #18
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    Quote Originally Posted by aquamogal View Post
    Hi Does anyone have a total wheel tire height with these mounted on ~30ID rim. I am trying look at bottom bracket drop, Thanks
    From memory they were around 712mm or so - closer to a normal 27.5 tyre than 29er.

  19. #19
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    you put 2.6s on a 24mm id rim and a super low 16psi?

    hope you have health insurance..

  20. #20
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    I tested new NoNis 2.60 Addix on Rolf Prima Rage XR rims (25.5mm internal) and they were virtually spot on at 2.35 at 25 psi.

  21. #21
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    That is kind of bizarre actually the 2.35 measures 2.4 on a 25mm rim. At least it will measure that after a couple weeks. They always are a bit narrow when you first mount

  22. #22
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    I already have a proper plus bike with NN 2.8's on i45 nexties. I love the plus tires so much I have completely neglected my hardtail. I'd like to breathe some new life into the HT, so I ordered up a set of the 2.6 NNs with apex sidewalls. My only problem is that the wheelset on the bike has 23mm ID rims. I do understand Ill have to run some higher than optimal pressures to keep the tires from rolling of the rims, especially at my weight.

    I'm just wondering how the 2.6s on i23 performed compared to the 2.35 magic marys (or ardents) that were on there before? Was it a clear upgrade in traction and suppleness? Was it a tradeoff in cornering because of the rounder profile? I'm coming from ardents that absolutely blow in sandy/hardpack conditions around here.

  23. #23
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    I run Nobby Nic 2.6 on 30mm and 35mm rims and wouldn't go any narrower than 30mm, in fact the 30mm rim already looks a bit too narrow whereas the 35mm rim looks a tad too wide - 33mm would be perfect IMO

  24. #24
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    Let me see if I understand this. The beef here with the tire is that itís really 1/10th of an inch small when seated on rims that are 10-15 mm narrower than recommended. This is literally the dumbest post of all time.

  25. #25
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    Mounted a pair of 2.6 NN of Flow Mk3 rims (30mm int). When first mounted they were under 2.5 at riding pressure (20 psi). After a couple months they've grown to a little over 2.5.

    Sent from my SM-G900V using Tapatalk
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  26. #26
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    Has anyone else noticed the 2.6 NNs feel very slow rolling?

    I recently broke the pivot bolt on my FS bike, and had to spend the last 3 weeks on my hardtail. I'm used to riding 2.8 NNs at 16F/18R, but the hardtail has 2.6 NNs at 18F/21R (pacestar/apex). The bike felt like it couldn't get out of its own way. It was like driving around with the parking brake on. For three weeks I rode with agony face, trying not to lag behind my usually slower buddies. Pumping up the tires didn't really help the rolling resistance much if anything, but it certainly reduced the grip. The bike is in perfect running order with nothing dragging, and no other obvious source of rolling resistance.

    Last night I finally got my FS (with the NN 2.8s) back up and running. Pumped the tires up to my usual 16F/18R and hit the trail. The bike felt effortless by comparison.

    My only guess is that the tires are woefully under-inflated, and when I tried to increase the pressure, the lack of grip is due mainly to the narrower rim profile. In any case, I absolutely HATE this tire combo on my hardtail. But maybe its simply too narrow a rim. Anybody else notice these tires make you feel like youre dragging an anchor?

  27. #27
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    Quote Originally Posted by GuitsBoy View Post
    Has anyone else noticed the 2.6 NNs feel very slow rolling?

    I recently broke the pivot bolt on my FS bike, and had to spend the last 3 weeks on my hardtail. I'm used to riding 2.8 NNs at 16F/18R, but the hardtail has 2.6 NNs at 18F/21R. The bike felt like it couldn't get out of its own way. It was like driving around with the parking brake on. For two weeks I rode with agony face, trying not to lag behind my usually slower buddies. Pumping up the tires didn't really help the rolling resistance much if anything, but it certainly reduced the grip. The bike is in perfect running order with nothing dragging, and no other obvious source of rolling resistance.

    Last night I finally got my FS (with the NN 2.8s) back up and running. Pumped the tires up to my usual 16F/18R and hit the trail. The bike felt effortless by comparison.

    My only guess is that the tires are woefully under-inflated, and when I tried to increase the pressure, the lack of grip is due mainly to the narrower rim profile. In any case, I absolutely HATE this tire combo on my hardtail. But maybe its simply too narrow a rim. Anybody else notice these tires make you feel like youre dragging an anchor?
    what compound are they? trailstar is a front tire only. use pacestar on the back for rolling

    if it's addix then you have speedgrip F&R which doesn't roll bad

    NN has a fairly huge range of rolling resistance between the compounds

  28. #28
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    Quote Originally Posted by racebum View Post
    what compound are they? trailstar is a front tire only. use pacestar on the back for rolling

    if it's addix then you have speedgrip F&R which doesn't roll bad

    NN has a fairly huge range of rolling resistance between the compounds
    Sorry, I dropped the ball not mentioning it. The 2.6 NNs were pacestar with apex sidewall. I have pacestar front and rear on the other bike too.

  29. #29
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    Are they all apex? That's a considerably slower rolling tire than snakeskin. It's a lot heavier

  30. #30
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    Quote Originally Posted by GuitsBoy View Post
    Sorry, I dropped the ball not mentioning it. The 2.6 NNs were pacestar with apex sidewall. I have pacestar front and rear on the other bike too.
    Its the tread design with large gaps between the center blocks. Compounds matter too but you can't get around the tread design itself. If you really want fast rolling along with plus widths, check out something like the wtb trailblazer which has a pretty consistent center block making its really fast rolling.

    https://www.wtb.com/products/trailblazer

  31. #31
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    Quote Originally Posted by racebum View Post
    Are they all apex? That's a considerably slower rolling tire than snakeskin. It's a lot heavier
    The 2.6s are apex, the 2.8s are snakeskin. Yes, I understand its a heavier tire, but I'm not talking about spinning the tire up, or climbing. I'm talking about the rolling resistance being probably 25% greater on the 2.6s.

    For instance, theres one section thats a slight downhill Ive ridden hundreds of times. On the 2.8s I can pick up speed while coasting over the downhill grade, to give my legs and lungs a brief break. With the 2.6's I lost speed, and eventually would have rolled to a stop, or so it seemed. A buddy of mine was on 2.8s and had no problems coasting. Like I said, I've double checked for other sources of drag. Scratching my head, never expected it to be so severe a difference.

    Quote Originally Posted by thesmokingman View Post
    Its the tread design with large gaps between the center blocks. Compounds matter too but you can't get around the tread design itself. If you really want fast rolling along with plus widths, check out something like the wtb trailblazer which has a pretty consistent center block making its really fast rolling.

    https://www.wtb.com/products/trailblazer
    I'm not looking for a different tire, im happy with teh nics. Just trying to figure out why my NN 2.8s roll so much better than the 2.6s did. And not talking about accel, its instantly noticeable simply coasting.

  32. #32
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    I've been running NN 2.6s on my Giant Trance with 23 mm internal width aluminum rims at 24 psi F/R. I've got two big dings in the rear rim. I weigh 180 lbs. It is surprising that I need higher pressures to protect the rim. Maybe wider rims would help????

  33. #33
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    I think so. I'm a bit lighter than you at ~160lbs, however have a 29mm width front and 25mm width rear rim. I run 17psi front (DHF 2.6) and 22psi rear (NN 2.6) and have no issues at those pressures, however expect I'd be able to go lower in the rear with a wider rim. At 20psi in the rear I have pinch flatted twice before, so 22psi seems like a sensible compromise.

    FYI I don't notice a huge diff in grip levels between those pressures, however the ease with which the tyre rolls over rocky trails is noticeably better at the lower pressure.

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