The Merida Big Seven 20 is a mountain bike, listed at $699. An off-road bike for trails, with grippy tyres and trail-ready geometry.
hardtail
SizingWhat size Big Seven 20 do I need?
cm
Enter your height to see the size Merida recommends.
Merida Big Seven 20 size chart
Size
Rider height
In feet
XS
under 163 cm
under 5 ft 4 in
S
157 to 173 cm
5 ft 2 in to 5 ft 8 in
M
167 to 183 cm
5 ft 6 in to 6 ft 0 in
L
177 to 190 cm
5 ft 10 in to 6 ft 3 in
XL
187 to 196 cm
6 ft 2 in to 6 ft 5 in
XXL
192 cm and over
6 ft 4 in and over
Rider heights from Merida's size chart (the brand chart for this model family). Height is a starting point: arm and leg length, flexibility and riding style all matter, so a test ride beats any chart. How bike sizing works.
SpecificationsWhat we know
Brand
Merida
Model year
2026
Category
Mountain
Wheel size
20-inch
Frame sizes
XS, S, M, L, XL, XXL
Price
$699, RRP AUD (99 Bikes)
Specs and pricing are listed in AUD and sourced from Australian retail listings. Confirm the current details and availability with the seller before purchase.
GeometrySize S
Merida Big Seven 20, size S. Published geometry, drawn to scale.
Stack
601 mm
Reach
390 mm
Stack/reach
1.54
Head angle
67 deg
Seat angle
74 deg
Wheelbase
1114 mm
Chainstay
442 mm
BB drop
37 mm
Standover
694 mm
Fork rake
42 mm
GearingRatios
0.71lowest (climbing)
2.91highest (speed)
Very low climbing gear
Ratios are derived from the chainrings and cassette. They describe the gearing, not any rider's ability.
Drivetrain & buildFull specification
Groupset
Shimano Essa
Shifting
Mechanical
Drive
1x
Speeds
8
Crank
Prowheel Epro-MD26S
Chainrings
32
Cassette
Shimano CS-HG300-8
Rear derailleur
Shimano Essa RD-U2000
Brakes
Shimano MT200 hydraulic disc
Rotors
160mm
Wheelset
Shimano TX505 hubs, Merida Comp CC rim
Rim internal width
20 mm
Stock tyre
27.5x2.4
Max tyre clearance
57 mm
Fork material
SR Suntour XCT30 HLO
BB standard
BSA
Seatpost
Merida Comp CC alloy
Cockpit
Merida CC bar and stem
Saddle
Merida Sport
SuspensionMTB detail
Front travel
120 mm
Fork
SR Suntour XCM32 NLO
Wheel config
27.5
Dropper
No, rigid seatpost
Discipline
Trail
Suspension
hardtail
Bike DNAWhat the numbers say
Steering
A 67 deg head angle points to balanced trail handling.
Climbing
Lowest ratio 0.71 is a very low climbing gear for steep or loaded climbs.
Derived from the published geometry and gearing above. It describes the numbers, not a ride test.
BikeFinder Data Profile: geometry and specification researched from published sources (merida-bikes.com + backfill 2026-09-27: 99spokes.com, merida-bikes.com), verified 2026-09-04. This is a specification analysis, not a physical ride review.