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All our frames and forks are tested continually to meet or exceed (in some cases, well exceed) EN standards 14764, 14765, 14766 and 14781 as well as the new ISO 4210 standards. We conduct these tests at our frame manufacturing facilities, but we also use EN accredited testing laboratories such as Intertek and SGS to verify the results of our own tests. If these tests aren’t telling us everything we want to know about our bikes, we increase the loads and cycles, or we determine another way to test. Where current hydraulic testing machines, jigs and hardware aren’t up to the task of emulating some of the forces and impacts our bikes might be subject to, we’ve designed our own.
We relentlessly cycle test for fatigue from pedaling and torsional forces on every single frame size, with deflection tests for stiffness at every point of the frame. Brutal impact tests with massive weights dropped on fixed frames or forks are performed. Then reversed, with weights attached to the frame, the frame hoisted to a given height depending upon product type, then released.
This destructive testing is enormously instructive and important. And it is in continual process. But it’s our ongoing non-destructive testing of frames and forks fresh off the factory floor that’s just as vital.
For our carbon fiber frames, EVERY frame is weighed to make sure it’s neither resin rich nor resin deficient. We also measure the stiffness of each frame in 6 critical areas as a check on lay-up production. Each deflection test must fall within 5% of the standards our machine and field-testing have established. This weighing and stiffness deflection testing guarantees every single frame we produce meets all Jamis manufacturing protocol and will
deliver the ride qualities we defined and demand.
These one-piece single-loops stays with trailing dropout plate have been a Boss and Taxi signature since 1980. Reducing the number of rear triangle welds makes these frames stronger and stiffer. And we don’t have to swage the tubes to a smaller diameter to mate with standard tabbed dropouts, allowing the stays to remain near constant in diameter, yielding an even stronger frame with a bigger, bolder style.
Many cruisers weigh well north of 40 pounds. Not so with the Boss and Taxi! Because nothing gets more uncomfortable faster than having to pedal more weight than necessary, we’ve pared as many grams from these bikes as we could. Starting with the lightweight aluminum frame and a parts pick that’s nearly all lightweight alloy parts. The result are bikes just north of 30 pounds that are easy to pedal and more fun to ride.
All Boss frame sizes (and there are six to assure the best possible fit for greater comfort and more secure handling) offer an extra long stem quill and head tube and hi-rise handlebars for a comfortable, uprght ride position
The Boss Saddle is as plush as it gets -- quilted top, wide body, fully stuffed, double-loop springs -- and is offered in both male and female specific lengths and widths. The Taxi saddle is as durable as it gets, with an extra-thick 3 mil cover to resist puncture, a flat top that won’t pool water when the Taxi is parked in the rain, box section rails that will never bend, and double-loop springs that comfortably support passengers.
Our comfort tires have been designed to roll smoothly on pavement, but offer a large 2.125” footprint so that rides on park paths can be managed securely. The additional benefit of that big footprint is larger air volume in the tire and tube, which results in lower air pressure for a more comfortable ride than tires with smaller volumes and higher air pressures.
Our cruise-control handlebars were designed to promote a comfortable no-weight-on-the-wrists riding position. With just the right sweep and rise, these handlebars meet the rider’s hands without requiring a forward bend at the waist, relieving pressure on the back of the neck. Handlebar width has also been carefully calculated so that when steered from left to right it does not contact the rider, unlike many other cruiser-style handlebars.
Many of the parts specified on our Boss and Taxi are made of aluminum to save weight, but also to help preserve the finish of the bike. Aluminum parts include the seat post, seat clamp, stem, rims, front hub, kickstand and crank arms. We’ve even specified a galvanized “rust-buster” chain on the Taxi which has a coating of zinc and chrome to protect the chain against rust. In fact, this coating increases the rust-resistance of the chain up to 500 times (!) that of a regular chain.
TOP FIVE THINGS YOU NEED TO KNOW
Our sloping double-diamond frame design offers the lightest possible frame weight, with 6 sizes assuring the best possible customer fit for the most comfortable & secure ride.
Alex's Zuma alloy rims are reliably true & durable and are laced on the Boss Coaster with 36 stainless steel spokes producing a strong, rust-resistant wheel.
The new generation Hi-Stop coaster brake features a new hub shell tested one by one on the production line for absolute concentricity to assure zero shoe vibration.
Our Boss saddle is as plush as it gets -- quilted top, wide body, fully stuffed, double loop springs -- with male & female specific saddle lengths & widths.
Our Jamis Cruiser bar is the most sensibly designed in the business -- just the right width, sweep & rise, for a perfectly comfortable upright ride that won't accidentally knock you in the ribs during tight radius, slow speed turns (like in a driveway or parking lot).
|Frame||Diamond frame design with 6061 aluminum oversized tubing, sloping top tube design, water bottle bosses, alloy kickstand, and painted steel chainguard|
|Fork||Oversized hi-tensile steel tubular unicrown with leading dropout and fender boss|
|Headset||Sealed, 1 1/8”|
|Wheels||Alex Zuma 36H black anodized alloy rims with alloy nutted front hub and Hi-Stop CB rear, 14 gauge stainless steel spokes|
|Tires||Jamis Cruise-control comfort tread, 26x2.125” with white stripe|
|Crankset||Forged alloy crank, 170mm alloy, with 44T compact disc chainring|
|BB Set||Cotterless bolt type, 3PB axle, 68 x 119mm|
|Pedals||Cruiser platform with TPE comfort insert|
|Brakeset||Hi-Stop coaster brake|
|Handlebar||Jamis Cruise-control comfort bar|
|Stem||Alloy hi-rise, 180mm quill, 100mm extension, with removeable 2-bolt cap|
|Seat Post||Alloy micro-adjust, 27.2 x 300mm, with 31.8mm alloy clamp and cromo seatpin|
|Saddle||Boss Cruiser design with extra padding and heavy-duty, double-loop springs|
|Sizes||M: S (17”), M (19”), L (21”), XL (23”) F: S (14”), M (18”)|
|Color||M: Silver Mist, Gloss Black, Pure Lime S/O: Silver Mist, Radiant Teal, Grape Jelly|
|SIZE||TOP EFFECTIVE||HEAD ANGLE||SEAT ANGLE||CHAIN STAY||WHEEL BASE||FORK RAKE||BB HEIGHT||HEAD TUBE||STANDOVER|
FIT & SIZING