Giant Reign SX 27.5" Mountain Bike 2021 - Downhill Full Suspension MTB

From the bike park to enduro tracks and steep singletrack shredding, this all-mountain bruiser has swagger to spare. The lightweight, super-stiff aluminium frame is long and low, and its Maestro suspension helps you float through the rough stuff.
This amped up version of the Reign enduro machine is made for riders who gravitate toward steep, rough and aggressive descents. It offers a longer travel 170mm fork and robust components that make it suitable for unforgiving terrain. The super strong and stiff ALUXX SL aluminium frame features updated geometry with a longer cockpit that’s designed to optimize its 27.5 wheels. The trunnion-mount Maestro rear suspension system offers 160mm of smooth, active travel and is bolstered by the new Advanced Forged Composite upper rocker arm, which is lighter and stronger than the previous aluminium design. If hammering through rock gardens and flying down steep descents is your idea of the perfect ride, then Reign SX is the machine for you.
27.5 agility and control
27.5-inch wheels balance agility and control, giving you the ability to roll over rugged terrain, flick the bike at speed, change lines, and explode out of corners.
Progressive suspension
Maestro rear suspension features a trunnion mount shock with a longer stroke and smoother feel. With 160mm of travel (and 180mm up front), it has an Advanced Forged Composite upper rocker arm for increased stiffness and strength plus lower overall frame weight.
Enduro geometry
The lightweight and stiff Aluxx-SL aluminium frameset features updated enduro-style geometry, so you can ride aggressive descents and rail corners with confidence.
Occasionally, without notice, manufacturers change product design and/or specifications.
Frame | ALUXX SL-Grade Aluminium, 160mm Maestro suspension |
Fork | RockShox Yari RC DebonAir, 180mm, Boost 15x110 Maxle Stealth, tapered, 37mm offset, custom tuned for Giant |
Rear Shock | RockShox Super Deluxe Coil Select, 205/62.5, custom tuned for Giant |
Stem | Giant Contact SL 35 |
Bars | Giant Contact SL TR35, 800x35mm, 20mm rise |
Front Brake | Shimano MT520 |
Rear Brake | Shimano MT520 |
Brake Lever | Shimano MT501 |
Rear Mech | Shimano Deore |
Shifters | Shimano Deore |
Speed | 10 |
Rims | Giant DH 27.5 tubeless ready sleeve-joint rim, 27mm inner width |
Front Hub | Giant Tracker Performance Boost 15x110, sealed bearing |
Rear Hub | Giant Tracker Performance Boost 12x148, sealed bearing |
Spokes | Sapim |
Front Tyre | Maxxis Minion DHF 27.5x2.5 WT, folding , EXO, TR |
Rear Tyre | Maxxis Minion DHRII 27.5x2.4 WT, folding, EXO, TR |
Seat Post | Giant Contact SL, zero offset, 30.9 |
Saddle | Giant Romero |
Chainset | Praxis Cadet, 34t, Giant custom design with MRP CS guide |
Bottom Bracket | Praxis BB-90, press fit |
Chain | KMC X10 |
Cassette | Shimano Deore, 11x42 |
Giant Reign 2021 Size Chart
Inside Leg (Inches) Vs Rider Height (Feet & Inches) |
26” |
27” |
28” |
29” |
30” |
31” |
32” |
33” |
34” |
35” |
36” |
37” |
5’ 3” |
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S |
S |
S |
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5’ 4” |
S |
S |
S |
S |
S |
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5’ 5” |
S |
S |
S |
S |
S |
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5’ 6” |
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S |
S |
S |
S |
S |
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5’ 7” |
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S |
S |
S |
M |
M |
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5’ 8” |
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M |
M |
M |
M |
M |
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5’ 9” |
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M |
M |
M |
M |
M |
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5’ 10” |
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M |
M |
M |
M |
M |
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5’ 11” |
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M |
M |
M |
M |
M |
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6’ 0” |
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M |
M |
L |
L |
L |
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6’ 1” |
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L |
L |
L |
L |
L |
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6’ 2” |
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L |
L |
L |
L |
L |
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6’ 3” |
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L |
L |
L |
L |
L |
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6’ 4” |
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L |
L |
XL |
XL |
XL |
What size frame do I need if I am between sizes? - read here
Giant Reign 2021 Geometry
|
S |
M |
L |
XL |
SEAT TUBE LENGTH (mm) |
431 |
431 |
464 |
496 |
SEAT TUBE ANGLE |
76.4° |
76.4° |
76.4° |
76.4° |
TOP TUBE LENGTH (mm) |
574 |
601 |
640 |
666 |
HEAD TUBE LENGTH (mm) |
100 |
100 |
110 |
120 |
HEAD TUBE ANGLE |
64.6° |
64.6° |
64.6° |
64.6° |
FORK RAKE (mm) |
44 |
44 |
44 |
44 |
TRAIL (mm) |
132.7 |
132.7 |
132.7 |
132.7 |
WHEELBASE (mm) |
1191 |
1220 |
1262 |
1289 |
CHAIN STAY LENGTH (mm) |
439 |
439 |
439 |
439 |
BOTTOM BRACKET DROP (mm) |
27 |
27 |
27 |
27 |
STACK (mm) |
622 |
622 |
631 |
640 |
REACH (mm) |
423 |
451 |
488 |
511 |
STAND OVER HEIGHT (mm) |
757 |
759 |
781 |
804 |
HANDLEBAR WIDTH (mm) |
800 |
800 |
800 |
800 |
STEM LENGTH (mm) |
40 |
40 |
40 |
50 |
CRANK LENGTH (mm) |
165 |
170 |
170 |
170 |
WHEEL SIZE |
29" |
29" |
29" |
29" |
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