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Thread: Jumbo Jim

  1. #1
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    Jumbo Jim

    Schwalbe is coming out with a new super light fat tire--the Jumbo Jim. It's 990 grams for 4.0 inches and 1290 grams for the heavier 4.8 inch casing (I think there might even be a light casing version of the 4.8, but the pinkbike article was unclear). I wonder if the tread will work on snow--the tread is pretty minimal compared to Bud, Lou, or even a Husker Du. Any thoughts...?
    Attached Thumbnails Attached Thumbnails Jumbo Jim-jumbo-jim.jpg  

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    My first impression is that the lugs are spread pretty far apart. My second impression....I want to try it!!

    Mr. Schwalbe, I love your 29er tires...please send me a fat tire to try.

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    Jumbo Jim

    Specs are now up on Schwalbe.com: http://www.schwalbe.com/en/offroad-r...jumbo-jim.html.

    There's also a new fat tube (at least I don't recall seeing it before), the 13J, which weighs 390 g.




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  4. #4
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    Yeh...

    Looks like a good summer tire. It certainly is light, but I wonder how tough it will be? Those two tend to be mutually exclusive. Ahh... doesn't matter anyway. Following their normal pricing, these will probably be $300. I don't see spending more for tires than I did for the wheels!
    Last edited by TrailMaker; 08-28-2014 at 04:45 AM. Reason: Spilling
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  5. #5
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    wie viel kostet es?

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    By those numbers their heaviest 4.8 is as light as most other manufacturers lightest 4.0. That's a huge difference.

    Which is it?
    a. they will hold up like tissue paper
    b. they did some serious R&D and have far superior materials/methods
    c. everyone else along the way has been winging it

  7. #7
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    The big Big Jim would make a nice light sand tire. I'm excited for these, Schwalbe knows what they are doing but they won't be for everyone that's for sure.

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    love the weight but would be skerred to run them where i ride. look forward to hearing more about these.

    rog

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    Quote Originally Posted by Gigantic View Post
    wie viel kostet es?
    From BikeRumor Eurobike report: "Retail price is set for 79.90 to 99.90 euros."
    So $105 to $132. Cheap!

  10. #10
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    Quote Originally Posted by SmooveP View Post
    From BikeRumor Eurobike report: "Retail price is set for 79.90 to 99.90 euros."
    So $105 to $132. Cheap!
    Not cheap at all cuz now I will have to build me a uber light summer wheelset to go with em. All said and done these will cost me over 1200 clams

  11. #11
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    Quote Originally Posted by SmooveP View Post
    From BikeRumor Eurobike report: "Retail price is set for 79.90 to 99.90 euros."
    So $105 to $132. Cheap!
    sweet!

  12. #12
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    Doesn't matter if they suck, because they are light people won't be able to help themselves from buying them.
    "It's only when you stand over it, you know, when you physically stand over the bike, that then you say 'hey, I don't have much stand over height', you know"-T. Ellsworth

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  13. #13
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    Quote Originally Posted by Jayem View Post
    Doesn't matter if they suck, because they are light people won't be able to help themselves from buying them.
    I have never been on a Schwalbe that sucked as long as I was using them for the conditions they where meant for, there might have been better but.........

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    Quote Originally Posted by Jayem View Post
    Doesn't matter if they suck, because they are light people won't be able to help themselves from buying them.
    Yes, I call these people guinea pigs. I've never ridden any Schwalbe tires, but they seem to have loyal followers, as well as a buncha people who gripe that they're expensive. All speculation for now. The proof is in the pudding.

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    Quote Originally Posted by SmooveP View Post
    Yes, I call these people guinea pigs. I've never ridden any Schwalbe tires, but they seem to have loyal followers, as well as a buncha people who gripe that they're expensive. All speculation for now. The proof is in the pudding.
    I run nothing but Shwalbe's on my 29er. They are expensive and worth every penny! I run Evo, Snakeskin Knoby Nicks. Where I ride it's nothing but rocks and sticks. I run tubeless with Stan's rims and sealant. I have never had any issue with punctures or sidewall tears. When they make a more aggressive tread than the Jumbo Jim I will buy a whole bunch of them for our fatties!!

  16. #16
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    Quote Originally Posted by gcappy View Post
    I run nothing but Shwalbe's on my 29er. They are expensive and worth every penny! ...
    They are my first choice for any tyre, so I'm happy to see a fat tyre from them.
    As little bike as possible, as silent as possible.
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    Does anyone have any info on availability?

  18. #18
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    Judging by the pics, would you say this tire would offer lower rolling resistance then the Ground Controls on hardpack? Sorry if it is a dumb question.
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    Quote Originally Posted by Tincup69 View Post
    Judging by the pics, would you say this tire would offer lower rolling resistance then the Ground Controls on hardpack? Sorry if it is a dumb question.
    My guess is probably yes. I think the gc rolls pretty well though.

  20. #20
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    Quote Originally Posted by Tincup69 View Post
    Judging by the pics, would you say this tire would offer lower rolling resistance then the Ground Controls on hardpack? Sorry if it is a dumb question.
    Yes.
    I like turtles

  21. #21
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    Um, ya think?

    rog

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    This review says the 4.8 Jumbo Jim measured 4.4" on a 100mm rim. Lame.

    http://www.bikerumor.com/2015/01/01/...at-bike-tires/

  23. #23
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    I'm a big fan of Schwalbe tires on my mtb bike...but I'm not sure that tread is going to be much use in the snow. As I don't ride my fatty in the summer much, I'll pass on it until I hear otherwise.
    Just get out ride it & have fun!

  24. #24
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    One of my distributors said mid month. Got my name on a pair. I'll let you know.

    rog

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    These are shaping up to be more of a fast, high-speed tire, and not a slow, high-grip tire. You can't have it all...
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  26. #26
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    Quote Originally Posted by cycloxer13 View Post
    These are shaping up to be more of a fast, high-speed tire, and not a slow, high-grip tire. You can't have it all...
    Low pressures and proper riding technique trump tread any day on most surfaces we ride on most of the time.

    rog

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    Re: Jumbo Jim

    Quote Originally Posted by cycloxer13 View Post
    These are shaping up to be more of a fast, high-speed tire, and not a slow, high-grip tire. You can't have it all...
    I thought that was clear from the start.

    Not sure why they reviewed them in snow then complained they don't grip. ???

    But not being true to size is a disappointment.

  28. #28
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    People are F stupid. I still think it is a decent tire. You can take one look at the tread and tell where it is going to shine. Set these up tubeless and run them at low pressure and I bet they rip on singletrack.

    Also, 4.4" is about right for the actual measurement of a 4.8. My Ground Controls measure in at 4.3" actual setup tubeless (they get a little bigger) and that is only a 4.6.
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    Well my knard 3.8 measure 4.9 on 65's. You need a pair.

    rog

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    Quote Originally Posted by newmarketrog View Post
    Low pressures and proper riding technique trump tread any day on most surfaces we ride on most of the time.

    rog
    This is so true, but an Endo in the front on an off camber downhill sweeper sure did require more technique than I could always deliver.
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    Quote Originally Posted by newmarketrog View Post
    Well my knard 3.8 measure 4.9 on 65's. You need a pair.

    rog
    such an old, heavy tire Rog, I'm holdin out for the Kenda's ;^)
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    Quote Originally Posted by cycloxer13 View Post
    such an old, heavy tire Rog, I'm holdin out for the Kenda's ;^)
    Me too

    Just getting the jj to tide me over til the kenda pro 4.0 gets here in August

    rog

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    Oh for sure I'd have ridden a 4.8 JJ today (no snow yet here in central MA). It would have been a fine choice. GC has more tread and is pretty good for all-around use, a great stock tire, but heavy too, mine are like 1,520 actual.
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    Re: Jumbo Jim

    Quote Originally Posted by cycloxer13 View Post
    Also, 4.4" is about right for the actual measurement of a 4.8. My Ground Controls measure in at 4.3" actual setup tubeless (they get a little bigger) and that is only a 4.6.
    I vaguely recall an early review saying the JJ was true to size which I thought was awesome. A light, big tire for wide rims in summer. If it's smaller than my GC's I'm not interested.

    EDIT: I just remeasure my GC's and I was wrong. They're NOT 4.5" on 90mm rims.
    Last edited by matto6; 01-04-2015 at 06:35 PM.

  35. #35
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    My GC's measure 4.3 casing, 4.4 knob - measured with calipers. This is right on par with how comparable 45Nrth tires measure. See here:

    http://45nrth.com/files/chronicles/T...etry_hires.jpg
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    Re: Jumbo Jim

    Quote Originally Posted by cycloxer13 View Post
    My GC's measure 4.3 casing, 4.4 knob - measured with calipers.
    Huh. On which rims?

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    Quote Originally Posted by cycloxer13 View Post
    Oh for sure I'd have ridden a 4.8 JJ today (no snow yet here in central MA). It would have been a fine choice. GC has more tread and is pretty good for all-around use, a great stock tire, but heavy too, mine are like 1,520 actual.
    Ya I picked up a GC at a friends shop. Fvckin boat anchor. If spesh offered a gc in a 3.8 120 tpi at around 1000 grams It'd be on like donkey kong. Game over.

    rog

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    Quote Originally Posted by newmarketrog View Post
    If spesh offered a gc in a 3.8 120 tpi at around 1000 grams It'd be on like donkey kong. Game over.
    ...a few things in the works, FB world is changing quick
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    Quote Originally Posted by cycloxer13 View Post
    ...a few things in the works, FB world is changing quick
    Bring it

    rog

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    I have had great results running Schwalbe Rocket Rons in the snow for past 3-4 years. Got a fatbike a couple of months ago.

    Thread on Jumbo Jims looks like what Rocket Ron has. I'll try a pair for sure.

    On a side note, bikeradar says they have run the Jumbo Jim at 10psi for testing. A bit high no.... ? They did mention in the comment section to play with pressures for riding, but who knows.

    These are also cheap compared to other options out there.

    Chris.

  41. #41
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    I want to try a set for the summer not sure four or 4.8
    It doesn't matter what I ride as long as I ride it Rubber Side Down●~●.

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    Quote Originally Posted by RockyJo1 View Post
    I want to try a set for the summer not sure four or 4.8
    I ordered the 4" for the summer, we will see.

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    I think the 4.0 and the Kenda Juggernaut 4.0 are both lookin really nice for singletrack tires. They are both on my short list.
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    Did some more high altitude testing of the Jumbo Jim Liteskin 4.8s over the weekend. My pressure gauge starts at 3.0, so I have to estimate pressure, but it should be well below 2psi in this clip.
    As can be seen from the video, it was a rather powdery section of ''trail'':

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    Quote Originally Posted by Espen W View Post
    Did some more high altitude testing of the Jumbo Jim Liteskin 4.8s over the weekend. My pressure gauge starts at 3.0, so I have to estimate pressure, but it should be well below 2psi in this clip.
    As can be seen from the video, it was a rather powdery section of ''trail'':

    WOW!

    Very cool video. I only wish we had that snow up at Big Sky Mt..

    Once again thanks.

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    Quote Originally Posted by Espen W View Post
    Did some more high altitude testing of the Jumbo Jim Liteskin 4.8s over the weekend. My pressure gauge starts at 3.0, so I have to estimate pressure, but it should be well below 2psi in this clip.
    As can be seen from the video, it was a rather powdery section of ''trail'':

    That was awesome. You ARE the man!

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    I've used that seesaw technique myself to try and keep moving forward when I suddenly encounter the soft stuff.

  48. #48
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    None of that would help me... Only 10" wide tires would get me on top of snow that soft.
    I like turtles

  49. #49
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    Jumbo Jim

    Quote Originally Posted by Espen W View Post
    Did some more high altitude testing of the Jumbo Jim Liteskin 4.8s over the weekend. My pressure gauge starts at 3.0, so I have to estimate pressure, but it should be well below 2psi in this clip.
    As can be seen from the video, it was a rather powdery section of ''trail'':

    What rims are those?


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  50. #50
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    Quote Originally Posted by racefit View Post
    What rims are those?
    Our own C4 103mm rims.
    Essentially a 103mm version of the 80mm rim that Borealis/Turnagain sells.
    I run them tubeless without any latex solution.
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