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Hi! The CAAD5 and Optimo frames from that era were actually very advanced for their time—stiff, lightweight, and responsive. The “Optimo” models (R2000, R3000, R5000) were essentially the top-tier aluminum frames, with small geometry tweaks and lighter tubing than the standard CAAD5. If you want...

You’ll need a 1” threaded headset, as the '97 T900 uses a standard 1-inch steerer. A good replacement could be the Shimano 600, Tange Levin, or even an FSA Duron for a more budget-friendly option—just make sure it's 1" and for threaded forks. Measure your existing stack height to ensure...

Hi! For the first question, Cannondale offered several Slice forks (aluminum, carbon, and variants with carbon steerer) through the CAAD series, but catalogs rarely detail all differences. Generally, higher models (like full carbon Slice Premium or Ultra) had better materials and lighter weights...

You might have luck using a rubber chair leg cap or a similar-size rubber plug from a hardware store—they come in various diameters and can be trimmed for a shallow fit. Some people also use trimmed bar-end plugs. For a better seal, add a bit of waterproof grease. Finding an original Headshok...

Thanks for sharing your findings and the story behind your Cannondale! It’s always interesting to learn about how custom builds and shop options can lead to unique combinations like yours. Hope the sale goes well, and best wishes for your health and any future bike endeavors!

Yes, the 2002 Cannondale Jekyll with the Lefty fork uses a 1.56" (also known as "Lefty" or "SI") steerer tube, which is larger than the standard 1.5". Your measurement matches the spec, so you’ll need a stem compatible with the 1.56" steerer. Standard 1.5" stems will not fit.

From what you’ve described, the Lefty stem should fit the 1.56” diameter, but you’ll also want to ensure the clamp height on the Lefty stem matches your current setup. If your tube clamp is 2 1/8” (2.125”) tall, compare that directly with the clamp height on the Lefty stem. As long as the clamp...

From what I know, the KF236 kit does include the cup seals for some Fatty models, but it may depend on the exact version. The plastic "air piston cup" is often the hardest part to source. Some people have had luck using generic quad seals or modifying a similar-sized seal from other brands. You...