What bike do I have?

1960's or 1970's Model T11 Schwinn 'Twin'. I think production started around 1964 or 1965. The reflector equipped pedals, if OEM, indicate later 1970's to 1980's production. The Sierra Brown color was also used in the 1970's and may have first been used around 1969 (I'm guessing at that introduction date).

Run your serial number here for the exact year of production:

angelfire.comSchwinnCodes1.htmlOpen ↗

re-cycle.comswnb serial.aspxOpen ↗

Model T11-6 was a standard Twinn with coaster brake rear hub and the 'Deluxe' T11-2 had the 2-speed hub.

Going by the stainless steel fenders, you may have a 'Deluxe Twinn' sub-model. Some model years referred to the stainless trimmed model (as opposed to the standard model that came equipped with matching painted fenders) as the Deluxe and some model years referred to the 2-speed hub model or the 5-speed model as the Deluxe.

There was also an available 2-speed kick back hub available for some model years and a model called the 'Twinn Sport' that was oriented more towards performance cycling than recreational cruising...although it was really not a racing model despite the sales literature claims and 10-speed configuration.

That thing is a classic, right down to its flat, spring steel forged fork and integrated kick stand. They are a fun ride on flat terrain.

I notice your cranks are oddly timed. Most tandems are set with both cranksets timed identically (both left side pedals at 12 o'clock) or with the rear crankset 90° out of phase with the front crankset.

In good condition, the Schwinn tandems still hold their resale value fairly well and often command higher Craigslist prices than the more popular 10-speed singles of the same era. Older folks seem to buy these up for use as retirement village and cycling path cruisers.

Note: Schwinn also built the Model T10 'Bicycle Built For Two' in 1964, but while similar to the Twinn the T10 used a different frame and had slightly different features.

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