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To S2 or not to S2 ; That is the question.

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ALL "USA" MADE "BALLOON" TIRES IN MY LIFE TIME WERE 2.125 INCH.
THEY FIT ALL BALLOON PREWAR/ POSTWAR DROP CENTER RIMS AND
ALL POSTWAR RIMS INCLUDING DROP CENTER, LOBDELL DROP CENTER
OR FLAT TOP RIMS AND SCHWINN S-2 RIMS.

WHEN YOU MOVE ON TO MIDDLE WEIGHT RIMS ONLY 1 3/4 AND "134"
(NOT 1.75) TIRES WILL FIT SCHWINN S-7 RIMS. THE 1.75 TIRES WILL FIT
ALL MIDDLE WEIGHT BALLOON NON SCHWINN RIMS.

THERE IS NO QUESTION THAT THE "STRONGEST RIMS" ARE THE SCHWINN
DOUBLE WALL TUBULAR S-2 AND S-7 RIMS. DON'T WORRY ABOUT WHAT
OTHER PEOPLE THINK ABOUT YOUR RIMS. USE WHAT YOU LIKE ON YOUR BIKE.

I HAVE NEVER HEARD OF THE DESIGNATED "standard 26” 559 tire".
CAN SOMEONE ENLIGHTEN ME ABOUT THAT "559" TERM?

WES
 
559 is metric (mm) of the diameter tire where it seats into the rim.
559 fits all 26” rims with decimal widths. e.g. 26 x 2.125, 26 x 1.75 etc. (including the Schwinn S2 rims.) 571 is the metric size for the fractional widths e.g. 26 x 1-3/4 tires for the Schwinn S7 rims
 
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where did I get this misinformation? is it true of the other sizes? S-7? S-6?


1472048
 
You cannot use “middleweight” and “balloon” in the same reference. Different frame sizes call for different tire size.
 
559 is metric (mm) of the diameter tire where it seats into the rim.
559 fits all 26” rims with decimal widths. e.g. 26 x 2.125, 26 x 1.75 etc. (including the Schwinn S2 rims.) 571 is the metric size for the fractional widths e.g. 26 x 1-3/4 tires for the Schwinn S7 rims
AHA!
26 x 1.00 through 5.0559 mmMost Mountain bikes, cruisers, fatbikes etc. Old Schwinn designation was S-2
26 x 1 3/4 571 mmSchwinn "middleweight" cruisers (S-7)
THANK YOU!
I GUESS I AM NOT TOO OLD TO LEARN SOMETHING NEW TO ME!
THANKS
WES
 
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Sheldon Brown made up a big chart. I put the info into my own words; Wes appears to have copied and pasted from the same source. Ether way if you separate decimal and fractional tire sizes into two separate groups, Sheldon’s chart is all you need. There are some exceptions but for older tires. The original Schwinn Tornados and some BF Goodrich tires had 26 x 1.75 tires that fit S7 rims, BUT it was stamped into the sidewalls “For S7 rims.” Those tires are probably only on display bikes now, not safe to ride.
 
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