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Today Specialized announced two new 650b (27.5-inch) Stumpjumper EVO models to dealers. The decision to make the move to 650b was based on consumer and retailer demand. 26-inch EVO models will be discontinued going forward, but 29-inch EVO models will still be available. Bikes are expected to be available as early as mid-April. Each model will come in two colors.

Specialized noted that they will use the "650b" designation instead of 27.5, as 27.5 is misleading because the wheels do not fall perfectly between 26 and 29. They'll also continue to stand behind the "bigger is better" mantra and the development of their 29-inch lineup. Specialized's official statement is at the end of this article.

Frame Features

  • 150mm of travel front and rear
  • Sealed cartridge bearing pivots
  • PF30 bottom bracket
  • 12x142mm dropouts
  • Tapered headtube
  • ISCG 05 mounts
  • Internal Command Post IR routing (carbon model)

2015 Stumpjumper FSR Expert Carbon EVO 650b



The Expert Carbon EVO model features a FACT 9m carbon front triangle and M5 alloy rear triangle. Parts include a RockShox Pike RC fork, FOX Float CTD Factory rear shock with AUTOSAG, Shimano XT brakes, SRAM X01 11-speed drivetrain, 650b Specialized tires, and 650b Specialized 142+ Roval Traverse wheels.

MSRP is $6,500 in the USA and 5699 euros in Europe. Weight is claimed to be 25.8-pounds (11.7kg).


2015 Stumpjumper FSR Comp EVO 650b



The Comp EVO model has an M5 Alloy frame with RockShox Revelation RC3 fork, FOX Float CTD rear shock with AUTOSAG, Shimano Deore brakes, SRAM X7/X9 2x10 drivetrain, 650b Specialized tires, and 650b Specialized 142+ Roval wheels.

MSRP is $3,400 in the USA and 2999 euros in Europe. Weight is claimed to be 28.4-pounds (12.9kg).


2015 Stumpjumper FSR Expert Carbon EVO 650b Frame

A frame and shock only package is also available for $3,000 in two color options.



Specialized has changed up the geometry for this new run of bikes as well. While horizontal top tube length and reach are a hair shorter, chainstays 15mm longer, and head angle 1.4-degrees steeper, the effective seat tube angle gets 0.5-degrees steeper for a better pedaling position and standover improves across the board.

Also of note, an XL option is listed in the geometry table but not in the spec sheets above.


Keep an eye on for the latest.

Press Release:


We believe in big wheels. When they are built properly for the rider and the experience; riders should ride the biggest wheel they can. 29ers are fast, stable, and fun to ride but not all 29ers are created equal. We have developed our Specialized style to minimize the negatives of a larger wheel by focusing on light weight, capability, and fun factor. From recreational hardtails to World-Cup-winning XC race machines to All-Mountain bikes and equipment for men and women—the Specialized 29er advantage is proven.

However, we know not every rider wants to ride a 29er; we will continue to serve the rider with a smaller wheel size. We are happy to introduce our first 650b bike, of course with experience and wheel size specific geometry, the Stumpjumper FSR EVO 650b.

WHY 650b NOW?

650b has the advantage over 26” in traction, stability, & roll-over. Additionally, our priority is serving the riders, who have clearly asked for this type of bike. We are not slowing down one pedal stroke on 29-inch innovation, as we believe in 29ers. Nevertheless, there are two clear scenarios when a smaller wheel, that is potentially lighter & quicker accelerating, may make sense for some riders.

1. Playful: When the rider wants to change directions slightly quicker. The smaller wheels on the 650b bike may feel a little more nimble.  Don’t forget our modern 29er geometry still retains shorter rear ends than most companies’ 650b offerings.

2. Size: When bike sizing or intimidation from taller wheels is an issue. We can make a 650b with more standover clearance on certain models.  There are also some riders, particularly newer riders, who might be intimidated by the look of the 29-inch wheel.

Because of these reasons, we say, “BIGGER IS BETTER. EXCEPT WHEN IT’S NOT.”


26” wheels will play a much smaller role in the future. They won’t go away altogether, but expect to see more 650b bikes and equipment. We call them 650b because that is what they are. The name 27.5” is misleading, as they are not in the middle of 29” & 26”.

Our tire team has already introduced 650b tires, while the Roval team is also working to provide the best wheels to the rider. As our position has been from the beginning, we will deliver the best bikes and equipment lines that will help the rider and our dealers. This rad new 650b bike will be available in shops by next week!

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