Joplin Carbon S
Built with some big updates that boost it into the modern world, the Juliana Joplin Carbon S Complete Mountain Bike has Boost rear spacing, and a new geometry, to push its boundaries from smooth and rolling singletrack to all-mountain trail riding. This is in part thanks to a slacker head tube that tracks with control through rocky sections, and a stiffer rear end that allows for flickable maneuverability. And not to mention 110mm of travel, allowing you to tackle terrain from the chunky rock gardens to long climbs loaded with tight switchbacks on this more-capable-than-ever XC and trail machine.
This year, the Joplin moves away from its XC race dedicated roots, and slides into a versatile all-mountain spot. By dropping the head tube angle a full 2.2-degrees, landing at the moderately slack 68-degrees, the Joplin feels more stable on descents than before, and with the addition of Boost spacing in the rear, you won't find that agility is sacrificed for this stability. Boost spacing stretches the rear hub outward to 148mm, allowing for the rear end to be tucked up underneath the bike, shaving 13.3mm off of the chainstays, which gives the bike a lively and snappy feel when putting down power, or getting playful on rollers and roots. With the updated geometry, the Joplin now enjoys its ability to bounce back and forth from XC race day on rolling singletrack, to chunkier trails up higher on the mountain.
The Virtual Pivot Point suspension has also taken queues from all-mountain trail bikes, gaining an additional 10mm, which aligns the Joplin perfectly with the emerging crop of 4.5in, do-it-all bikes. Suspension also happens to be where we find the key difference between the Joplin and the Tallboy—the shock tune. Juliana's market research finds that the typical women cyclist weighs in about 30lb lighter than men, and the shock was adjusted so that we can enjoy the same plush benefits of VPP as the guys. This model features a FOX Float Performance DPS shock, with a light shock tune that allows us to take full advantage of the 4.5-inches of travel. Despite the changes in tune, the VPP design is a carry-over from Santa Cruz's re-worked frames like the Bronson 2.0 and 5010 2.0. It's inspired by the enduro-roots of the Nomad, and as a result, the links stay out of the way, which allows the shock to nestle in its spot with room for bottle cages, and enabling more ground clearance with lower standover height.
The latest VPP's changes aren't limited to wandering links, though; the system's tuning has also been tweaked. Where the old suspension curve described a deep "U," the new VPP's curve resembles a flattened check mark, with less dramatic ramping on either end of the arc and, as mentioned above, a lighter tune to give lighter riders access to the deep end. The results are that, during the initial and mid stroke, it boasts improved square edge bump compliance to keep the tires glued to the trail for more traction across lumpy trails and root latticed climbs. It also maintains its predecessor's firm feel during accelerations, so it won't dampen the Joplin's spirited kick while rallying for position in a mass start or a finishing sprint. The shock's ramp-up arc doesn't dramatically alter as the shock compresses, so the pedaling platform stays consistent across travel, with less wallowing, bob, and bottom-outs, even while the Boost axle's path turns rearward to absorb bigger hits deep in its travel.
Juliana's industry-leading carbon fiber construction has made its way to the Joplin, although this version uses a slightly lower grade of carbon fiber than the top-tier Carbon CC frame. This requires more material to achieve the same strength, so it does carry a bit more weight, but in every other aspect it's held to the same uncompromising standards as Juliana's Carbon CC frames. The upshot is that you get a frame that's every bit as stiff and strong at much more palatable price point. The frame's two carbon triangles are built as whole pieces rather than glued together from disparate bits, a method that saves weight and increases structural integrity by allowing Santa Cruz to wrap carbon continuously through and around key junctures. This process reinforces the frame with less material while eliminating the artificial stress points that result from bonded construction methods. Finally, the carbon is also compacted from the inside and the outside for a more even finish that avoids any structural defects, excess material build-up, and resin pooling for (you guessed it) even more weight savings.
The Joplin's reworked linkage means it's one-by only, but with the huge gear range of SRAM Eagle, this built still offers you some easy-pedaling bailout cogs that might be missed in other one-by drivetrains. The threaded bottom bracket is another feature that we've come to just expect from the California-based brand, and it's a strong selling point for those who don't like dealing with the tricky tolerances and creaky interface of press-fit models.
- Versatile, race-ready ride for XC and trail endeavors
- 4.5in of supple VPP suspension soaks up roots and rocks
- Women's-specific shock tune for lighter weight riders
- Slacker head tube elevates stability descending
- Roomy reach shifts weight forward for better traction
- C level carbon construction balances weight and price
- SRAM Eagle drivetrain includes huge bailout gear