The Schwinn Jaguar Bicycle A Detailed Look At A Classic American Ride

The Schwinn Jaguar Bicycle A Detailed Look At A Classic American Ride

The Schwinn Jaguar was produced from roughly 1965 to 1977 as Schwinn's top-tier road racing model. It sat above the Roadmaster and below the Interclub in the model hierarchy, though the lines between those tiers got fuzzy depending on the year. The frame is chromium-molybdenum steel, brazed throughout, with lugs on earlier production runs and more tapered butted tubing on later ones. Schwinn sourced components from Campagnolo, Simplex, and SunTour depending on what was available and what made financial sense that quarter. I've owned three Jaguars over the last twenty years and restored a fourth that came to me with a bent rear dropout and a bottom bracket that hadn't been spun since 1973. The thing about these bikes is that they're not particularly special if you don't know what to look for, but they're also not easy to fully restore correctly because a lot of the parts are gone from anywhere. Schwinn used proprietary thread pitches on the coaster brake hubs and some of the rear dropouts were machined to accept only Schwinn-branded caliper brackets. I learned that the hard way in 2018 when I tried to fit a standard Shimano road caliper to a 1971 model. The bolt pattern is 46mm center-to-center on most Jaguars, which is standard, but the bridge that attaches to the seat stay is unique to Schwinn and the casting is thicker than typical European calipers. The workaround was finding a vintage Campagnolo Record caliper with the right mounting boss, which took me about three months on eBay and two surplus shops in Ohio. The drivetrain on these bikes is where the real variation shows up. Early Jaguars from 1965 through 1968 often came with a Campagnolo Gran Sport rear derailleur and a Campy record shifter setup. By 1969 Schwinn had started mixing in Simplex instruments, and by 1972 they were firmly into SunTour territory. The cranksets were almost always Schwinn branded but made by a variety of manufacturers. The five-speed models used a Park Tool compatible freewheel, which matters because modern cassettes won't mate with the original hub bodies without an adapter ring that Schwinn never made in house.

The fork is a straight-bladed chrome model on pre-1972 bikes and a flared design on later ones. The head tube uses a standard 1-inch threaded headset, which is actually one of the good things about these bikes because every parts bin on earth has what you need. I replaced the original fork on a 1967 Jaguar with a late-1970s Colnago steel fork and it dropped the steering weight noticeably without changing the geometry enough to make the bike feel unstable. That said, I wouldn't recommend it unless you're doing a full build. The original rake is 2-1/8 inches and swapping to a fork with different rake changes the trail, which affects how the bike tracks at speed. The Jaguar was designed to feel stable at 40-plus mph, which is why Schwinn spec'd it with a relatively slack head angle of around 73 degrees. Braking performance on a stock Jaguar is adequate but not impressive by modern standards. The factory calipers are dual-pivot aluminum or steel, depending on the year, and the cable routing is internal on some models and external on others. Internal routing is a pain to service and I've seen more than one Jaguar with seized internal cables because water and road grime get trapped in the downtube. The fix is to fish them out with a stiff wire and a generous amount of lightweight grease, but if the cable housing is cracked inside the frame you're looking at replacing the entire run. I usually just convert these bikes to external routing. It's visually less correct but it means the brakes will actually work when you need them. The saddle is another area where condition varies wildly. The original Chromolly saddle with its rubber cushion and chromed springs is uncomfortable by any reasonable standard and most surviving examples have cracked or separated cushions. The period-correct replacement is a Brooks B-17 or a Selle Italia Rally, both of which fit the standard two-bolt rail spacing. If you're going for strict stock appearance, Schwinn also made a replica saddle in the early 1970s that looks close enough but still isn't as good as a broken-in Brooks. I run a Brooks B67 short version on my 1972 Jag and it's been fine after about sixty miles of break-in. The original seat post is 27.0mm diameter and 270mm length, which is standard for the era. Replacement posts are easy to find.

Wheel building on a Jaguar requires knowing that the rear hub is a Shimano Nexus or a Schwinn-branded equivalent depending on the model year, and the spoke pattern is typically 36 holes with a left-side freewheel drive. The original tires are the weak point on any surviving Jaguar because Schwalbe and other modern manufacturers don't make the 27 x 1-1/8 size that these bikes used. The closest modern equivalent is 700C x 28mm, but that's not quite the same wheel diameter and you'll run clearance issues in the forks and stays. The correct approach is to find a set of WTB SX216 or Veloflex Touring tires in 27 x 1-1/8, or go with the older Continental Grand Prix 2000 in the same size. Both are harder to find than they should be and cost more than a modern road tire, but they fit properly and don't rub. One thing people consistently get wrong about the Jaguar is the bottom bracket shell. It's threaded at 1-3/8 inch by 24 TPI, which was the French standard, but Schwinn sometimes used English threading on later models. The only way to know for sure is to measure the spindle length and the shell width. A 1968 Jag has a 126mm spindle and a 68mm shell. A 1975 model might have a 130mm spindle and a 70mm shell. Putting the wrong bottom bracket in will strip the threads and that's it, you've ruined the frame. I use a Park Tool BBT-9 wrench set to check the threading direction before installing anything, and I always apply a bit of anti-seize compound to the threads so they come out next time instead of being fused in place. The paint on these bikes is mostly original lacquer on surviving examples, and refinishing is almost always worse than the original. Schwinn used a single-stage enamel process that's difficult to replicate correctly. If your Jag has flaking paint, the right move is to touch it in with a fine brush and matching paint rather than taking it to a frame shop. The color codes are printed on a small tag inside the rear dropout area. A 1970 Jaguar in the standard red and silver scheme has a frame number that starts with JG followed by the production sequence. Those numbers help date the bike and confirm it hasn't been swapped with parts from a different model year.

If you're considering buying one, the main things to check are the rear triangle alignment, the condition of the original chromed fork, and whether the headset bearings are still smooth. A bent rear triangle makes the bike unrideable at speed and is extremely expensive to fix. The fork can be trued in a pinch but a cracked steerer tube is a death sentence. Headset bearings on these bikes are cone-and-cup style and they wear out. The replacement is a standard 1-inch threaded headset from any bike shop, but you'll want to match the bearing count and cup depth to the original spec or the steering will feel vague.