Why drive around with a valuable bike outside your car? A bike built around this convenient folding frame rides securely and conveniently inside. You don’t even need a car rack.

This is the same frame used for the CHANGE 811 folding rugged hybrid (with carbon fork) and CHANGE 812 folding mountain bike (with shock fork).

SKU: CF833 Category:

Additional information

Weight14 lbs
Dimensions41 × 7 × 23.5 in

17", 19", 21"


Arctic Blue, Black, Pine Green

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MTB Frame Sizing

Start with your body height and inseam (if you're on the border line or have short legs). Then find the matching frame size.

sizing icon
Height (Inches)5'1" to 5'8"5'8" to 6'2"6'2" to 6'7"
Inseam (Inches)29"31"33"
Frame Size (Inches)17"19"21"
Head Tube (Inches)4.3"4.7"5.9"
Top Tube (Inches)23"23.6"24.6"



If you’re building a bike to go off the beaten path, you’ll want to start with something light, yet rugged. Unlike other folding bike frames, this light (5.5 lb) double-butted aluminum hardtail frame has passed the ISO 4210 destruction test suite for mountain bikes. And yet, unlike other MTBs, a bike built on the CHANGE 833 frame can travel everywhere in your car trunk, free from weather, road grit, and curious hands. After your day on the mountain, you can enjoy your dinner and trail stories in peace, knowing that your amazing ride is safely tucked away from view in your trunk.

SPECIFICATIONS833 folding mountain bike frame
Frame Sizes17" (430mm),19" (480mm),21" (530mm)
Folded Size26" x 26" x 10" frame only (See CHANGE 811 and CHANGE 812 for full-bike folding)
Frame ColorsMatte Black, Pine Green, Arctic Blue
Frame ConstructionHydroformed, double-butted, aerospace-grade 7005 Aluminum
Ruggedness certificationISO 4210 destruction test suite (passed)
Brake mount typePost-mount disc brakes
Axle typeQuick release
Cable routingInternal with removable ports
LatchesTop latch CNC meshed-tooth with butterfly-style cam (like a ski boot latch). Bottom latch cam compression lever (like a seat post latch)
Other featuresSeatstay hook for front wheel storage when folded, rubberized seat tube foot to protect bike when folded.
ForkNot included. Pairs well with a tapered headtube, MTB-style fork, either solid or shock.
Frame Weight2.5kg (5 lbs 8 oz)
PedalsWellgo flat pop-off pedals (2nd generation)
INCLUDEDPress-fit FIRST headset, seat clamp, black canvas carry bag, derailleur hanger, manual, warranty card
Seat Post Size31.6mm
Bottom bracket73mm English threaded
Wheel sizes700c, 27.5", 26"
Max tire width2.4"