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  1. #11
    Elite Member Zebrafive's Avatar
    Join Date
    Aug 2010
    Posts
    3,466
    Location
    South West MI
    Tractor
    John Deere 2030, John Deere 6415

    Default Re: Tire Size comparison

    MY JD 6415 (85hp) came with 18.4R-34s I was surprised it had such big tires for an open station tractor.
    Last edited by Zebrafive; 02-08-2013 at 10:58 PM.
    John Deere 2030 JD 245SL Loader
    John Deere 6415 mfwd JD 640SL Loader

  2. #12
    Gold Member
    Join Date
    Mar 2008
    Posts
    280
    Location
    Ohio
    Tractor
    JD 6330, JD 5055e, Ford 4000,

    Default Re: Tire Size comparison

    I don't think so. I just pulled the trigger on a 6330 in stead of the 5115 and it as the 34's on it.

  3. #13
    Veteran Member MHarryE's Avatar
    Join Date
    Feb 2009
    Posts
    1,892
    Location
    Northeastern Minnesota
    Tractor
    JD 7720; Kubota M135GX, NH TS115A; JD 6230; Kubota L5740

    Default Re: Tire Size comparison

    The 420/85R34 has an English equivalent 16.9R34, is 16.5 inches wide, and has a 188 inch rolling circumference. Tread depth is 56/32 inches. Titan list price is $3007.49. The advantages are higher load capacity, greater floatation, improved traction and smoother ride.

    The 18.4R30 is 19.3 inches wide and has a 182 inch rolling circumference. Its tread depth is 50/32 inches. Titan list price is $1755.49. The advantages are tread wear and durability, maximum tread cleaning and sidehill slip resistance.

    The advantages are the ones listed in the Titan book for those particular sizes.

    From the John Deere sales manual, the R1W tires offer a deeper tread and are popular in wetter soils. It goes on to say that many European utility tractors use R1W tires. But 56/32 vs 50/32 doesn't seem like that much tread height difference (only 3/16 inch) but the tread patterns shown in the Titan book are very different.

    Finding the right tires
    JD7720; KubotaM135GX; NH TS115A; JD6230; KubotaL5740

  4. #14
    Gold Member
    Join Date
    Mar 2008
    Posts
    280
    Location
    Ohio
    Tractor
    JD 6330, JD 5055e, Ford 4000,

    Default Re: Tire Size comparison

    Quote Originally Posted by MHarryE View Post
    The 420/85R34 has an English equivalent 16.9R34, is 16.5 inches wide, and has a 188 inch rolling circumference. Tread depth is 56/32 inches. Titan list price is $3007.49. The advantages are higher load capacity, greater floatation, improved traction and smoother ride.

    The 18.4R30 is 19.3 inches wide and has a 182 inch rolling circumference. Its tread depth is 50/32 inches. Titan list price is $1755.49. The advantages are tread wear and durability, maximum tread cleaning and sidehill slip resistance.

    The advantages are the ones listed in the Titan book for those particular sizes.

    From the John Deere sales manual, the R1W tires offer a deeper tread and are popular in wetter soils. It goes on to say that many European utility tractors use R1W tires. But 56/32 vs 50/32 doesn't seem like that much tread height difference (only 3/16 inch) but the tread patterns shown in the Titan book are very different.

    Finding the right tires
    Thanks a ton!

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