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2021 Jamis

EXPLORER A2

A 650b aluminum frame comfort bike with mid-range components and promax rim brakes.
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Manufacturer Price

USD 599($837)
Weight13.8 kg  
FrameAluminum
SuspensionRigid
ForkSteel
Wheels650b Aluminum
Drivetrain3 × 7
GroupsetTourney
BrakesPromax Rim
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Insights
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

45 km/h

EXPLORER A2

47 km/h

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Highest gear

(descending)

Geometry
Specs
Build
Frame

6061 TIG-welded aluminum, all-new sport comfort design with upright ride position, replaceable derailleur hanger

Fork

Hi-tensile steel unicrown, radius blades with dropout eyelets

Bottom Bracket

Sealed cartridge, 68 x 110.5mm

Headset

Internal cup, threaded, 1 1/8”

Stem

Jamis alloy, angle-adjustable, 90mm ext x 150mm quill (14 ̊18”) or 110mm ext x 180mm quill (19 ̊21”)

Handlebar

Comfort hi-rise, steel, 25.4 x 80mm rise x 15 ̊ sweep x 640mm

Saddle

Jamis Comfort with extra thick padding, synthetic suede top, burnished side panels and bumper springs

Seatpost

Alloy micro-adjust, 350mm x 27.2mm, with alloy QR clamp

TypeRigid

Pedals

Comfort platform with TPE non-slip insert

Grips

Kraton comfort

Groupset
Rear Derailleur

Shimano TY300

Front Derailleur

TY510 top swing/dual pull

Crank

Forged alloy, 48/38/28T, 170mm with chainguard

Shifters

Shimano EZ-Fire Plus, ST-EF500, 21-speed

Cassette

Shimano freewheel 7-speed, 14-34

Chain

KMC Z7

Brakes

ProMax alloy direct pull brakes with Shimano levers

TypePromax Rim

Wheels
Rims

Alloy 36H rims, Formula alloy hubs, QR front and rear, 14g stainless steel spokes

Tires

CST – 1918, 27.5 x 2.1

Rider Notes
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First added 31 July

Last updated 29 October

Not listed for 1,308 days