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Thread: Vintage Style Tire Treads

  1. #11
    Senior Member Herb591's Avatar
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    Your rims sound narrow for the tire sizes your running. Especially the rear. The front is border line. https://thisiscasperslife.files.word...size_chart.pdf
    1970 CB450 K3
    Currently in the garage,
    '06 HD Screaming Eagle Ultra
    '95 HD Sportster, the current Land Speed Record Holder for Bonneville and El Mirage
    '74 Champion framed Yamaha 250 MX dirt track race bike
    '74 Yamaha 250 MX, my trail bike
    '72 Yamaha 250 MX
    '76 Yamaha GT80 MX
    '68 Honda CT-90
    oh yeah,
    '95 or so Suzuki 250 GSXR, 4 cyl., 250, for Japan only
    For gettin around the pits, '74 HD Golf Cart

  2. #12
    Super Moderator longdistancerider's Avatar
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    Correct rims and tire sizing per Honda. The 3.60 and 4.10 sizes seem to be troublesome to find, I'd go with the 3.50 and 4.00 which are basically 1/10th of an inch narrower or you can go with metric front 90/90 and rear 110/90
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 nuts and bolts restore in progress


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  3. #13
    Senior Member Old Okie's Avatar
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    The reason for my concern is the wheel size, 1.85 does not seem right for a 400 tire.
    On the bike now is a 3.25 and a 4.25. The front looks OK but the rear does not.
    Would some one with a 1979 CB400T II please check the wheel sizes before I order these tires.
    A 350 and a 400 Dunlop K70 are available if that will work. The parts fiche shown 2 part number
    for the wheels for this bike but there are no details. The official Honda manual is no help either.
    Last edited by Old Okie; 02-18-2018 at 09:46 PM.
    1979 Honda CX500 Custom
    1979 Honda CB400T II
    1981 Yamaha XS650
    1972 Suzuki RV90, ole smokey for the grand-kids.
    2000 Jincheng JC50Q-7, a free bike for the grand kids.
    Glad it was free, I would never buy anything like that.

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  5. #14
    Super Moderator longdistancerider's Avatar
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    The FSM calls for a 3.60 S 19 and a 4.10 S 18
    3.60 x 26mm = 93.9mm so a 90/90/19 front
    4.10 x 26mm = 106.6mm so a 100 or a 110/90/18 rear
    Last edited by longdistancerider; 02-19-2018 at 01:46 AM.
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 nuts and bolts restore in progress


    https://www.hondatwins.net/forums/22...d-attempt.html and https://www.hondatwins.net/forums/1-...r-attempt.html
    Road Trip https://www.hondatwins.net/forums/11...here-i-go.html or "where's Jim now?"
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  6. #15
    Senior Member Herb591's Avatar
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    They may be the correct tire sizing per Honda but not the tire manufacturers. I would bow to the tire manufacturers on this subject. The 1.85 rim is more compatible with a 3.00 tire. Dunlop recommends a 2.15 rim on both tire sizes. https://www.dunlopmotorcycletires.com/tire-line/k70/
    1970 CB450 K3
    Currently in the garage,
    '06 HD Screaming Eagle Ultra
    '95 HD Sportster, the current Land Speed Record Holder for Bonneville and El Mirage
    '74 Champion framed Yamaha 250 MX dirt track race bike
    '74 Yamaha 250 MX, my trail bike
    '72 Yamaha 250 MX
    '76 Yamaha GT80 MX
    '68 Honda CT-90
    oh yeah,
    '95 or so Suzuki 250 GSXR, 4 cyl., 250, for Japan only
    For gettin around the pits, '74 HD Golf Cart

  7. #16
    Member fox_warren's Avatar
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    longdistancerider likes this.

  8. #17
    Member cfile's Avatar
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    Per the rim charts, 1.85 inch rims work for 90mm, 3.25", 3.50", 3.60" and 4.10", the latter two being a low profile tire. Also, MJ and ML size. I've seen at least one chart that also included a 100mm tire, but no tire manufacturers that list that rim for that tire. 3.75" and 4.00" call for at least a 2.15 as do the 100mm's on most charts. Lots of folks are apparently running the 100mm's on those rims and I am trying to decide if I will bite the bullet and do so myself, since the 90mm options are limited and will likely require me to mismatch brands or styles that offer a 120/90/16 which is my substitute for the 4.60 x16, another low profile tire well suited to the cruisers of the day.

  9. #18
    Senior Member oupa's Avatar
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    You want vintage style tires? They'll be at Oley, PA this weekend. They're probably there now.
    https://www.cokertire.com/tires/styl...ycle-bike.html
    "They're not like cars with a body that rusts out in a few years. Keep them tuned and overhauled and they'll last as long as you do. Probably longer." - Robert Pirsig

  10. #19
    Cal
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    Quote Originally Posted by cfile View Post
    Per the rim charts, 1.85 inch rims work for 90mm, 3.25", 3.50", 3.60" and 4.10", the latter two being a low profile tire. Also, MJ and ML size. I've seen at least one chart that also included a 100mm tire, but no tire manufacturers that list that rim for that tire. 3.75" and 4.00" call for at least a 2.15 as do the 100mm's on most charts. Lots of folks are apparently running the 100mm's on those rims and I am trying to decide if I will bite the bullet and do so myself, since the 90mm options are limited and will likely require me to mismatch brands or styles that offer a 120/90/16 which is my substitute for the 4.60 x16, another low profile tire well suited to the cruisers of the day.
    If I'm reading this right, a 4.00 tire requires a LARGER rim than a 4.10 tire?? I'm confused

  11. #20
    Super Moderator longdistancerider's Avatar
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    Yes, it is confusing at best. Tires have evolved over the years quite a bit. I just go with the Honda spec sizing
    Cal likes this.
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 nuts and bolts restore in progress


    https://www.hondatwins.net/forums/22...d-attempt.html and https://www.hondatwins.net/forums/1-...r-attempt.html
    Road Trip https://www.hondatwins.net/forums/11...here-i-go.html or "where's Jim now?"
    Member Map https://www.hondatwins.net/forums/dcMembermap.php

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