What you don’t get for your money!
In 2004, Challenge woke everyone up with the SL series of bikes. Not one, but four series of ultra light recumbents from 18-23 pounds in various formats, low racer, mid racer, high racer and level BB. 3 cockpit formats: open cockpit, USS, and preying mantis, provide the widest choice of any manufacturer.
The heart of this technology is the butted split tube frame technology combined with carbon fiber or SL aluminum seating, carbon fork, and boom technology.
On the Seiran SL and Fujin SL you will note that the frame is one piece, from boom insertion point at the front, all the way to the rear dropouts. No welded on stays!
If you want some cush along with your SL, the mid racer Hurricane SL or level BB Mistral SL feature injection molded carbon fiber rear suspensions at the same SL weights.
Compare these bikes, and you will find no lighter bikes available in their price range.
Mistral SL
The Mistral SL brings the easy to adapt level crank position and more upright
seating to the Challenge SL selection.
Featuring the Challenge butted aluminium main frame and carbon rear swing arm
rear suspension, the Mistral SL combines ultra light weight with the surprise of
a silky smooth suspension ride.
Finally, the rapid acceleration only a 20″ wheel format can deliver.
Fujin SL II
It’s not what you get, but what you don’t get that makes this bike the
ultimate speed machine!
Weighing just over 8 kg, the Fujin SL II is one of lightest, fastest and most
loved low-racers on the market.
People really love their Fujin SL’s. Hands
down the best handling low racer on the market.
Hurricane SL
The snappy mid racer Hurricane SL. Ultimate aerodynamics with the quick
acceleration that only happens on a 20/20 wheel format bike. Challenge SL
technology brings the weight down to the 9-12 kg range depending on your
build.
Order the Hurricane SL with a Challenge Day Rack, and the Hurricane SL
becomes a sport touring bike with open clearance forks, and excellent stability
thanks to the torsionally rigid injection molded carbon rear end.
Seiran SL
The most modern high racer, the Seiran SL looks right in its proportions, and
the translation into performance is real. Known as the bike that loves a good
climb, rolls out the high cruising speeds, it will be the bike to keep you in
the fast riding pack.
The 125 cm wheelbase with fixed seat position and adjustable boom keep
handling dynamics consistent, with more sure contact with the ground than other
high racer ultra lights
