Trek Checkpoint AL 4 2019 is an ideal entry point to the world of gravel riding. It’s built with a lightweight aluminum frame and a durable parts group that won’t quit on you as your skills advance. Plus, this gravel bike has exceptional versatility. Extra mounts make it easy to add bags and racks for daily commutes and touring.

Colors: Battleship Blue, Matte Gravel

Sizes: 44, 49, 52, 54, 56, 58, 61

Trek Checkpoint AL 4 2019 Specs

Frameset

Frame Alpha 200 series aluminum, tapered head-tube, flat-mount disc brakes, 12mm thru-axle, internal cable routing, w/rack mounts and hidden fender mounts

Fork Checkpoint carbon disc, tapered steerer, flat mount disc brakes, rack mounts, hidden fender mounts, 12mm thru axle

Trek Checkpoint AL 4 2019Wheels

Front hub Formula alloy disc, 12mm thru-axle, 24h

Rear hub Formula alloy disc, 12mm thru-axle, 24h

Rims Bontrager Affinity, Tubeless Ready, 24h

Tires Bontrager R1 Hard-Case Lite, 700x32cMax tire size38c Bontrager tires (with at least 4mm of clearance to frame)

Trek Checkpoint AL 4 2019 Drivetrain

Shifters Shimano Tiagra, 10 speed

Front derailleur Shimano Tiagra

Rear derailleur Shimano Tiagra

Crank Shimano Tiagra, 50/34 (compact)

Bottom bracket Sealed cartridge

Cassette Shimano Tiagra, 11-32, 10 speed

Chain Shimano Tiagra

Pedals Not included

Trek Checkpoint AL 4 2019 Components

Saddle Bontrager Arvada Comp, steel rails

Seatpost Bontrager Approved, alloy, 27.2mm

Handlebar Bontrager Comp VR-C, 31.8mm

Grips Bontrager tape

Stem Bontrager Elite, 31.8mm, 7 degree, w/computer & light mounts

Headset Integrated, cartridge bearing, sealed, 1-1/8˝ top, 1.5˝ bottom

Brakeset Shimano RS405 flat mount hydraulic disc  

Trek Checkpoint AL 4 2019 Weight

Weight56cm – 10.56 kg / 23.28 lbsWeight limitThis bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 275 pounds (125 kg).

Trek Checkpoint AL 4 2019 Sizing

Size	Rider Height	Inseam
44	150 – 153 cm4’11” – 5’0″	71 – 73 cm28″ – 29″
49	156 – 163 cm5’1″ – 5’4″	74 – 77 cm29″ – 30″
52	163 – 168 cm5’4″ – 5’6″	76 – 79 cm30″ – 31″
54	168 – 174 cm5’6″ – 5’9″	78 – 82 cm31″ – 32″
56	174 – 180 cm5’9″ – 5’11”	81 – 85 cm32″ – 33″
58	180 – 185 cm5’11” – 6’1″	84 – 87 cm33″ – 34″
61	185 – 191 cm6’1″ – 6’3″	86 – 90 cm34″ – 35″

Trek Checkpoint AL 4 2019 Geometry

All measurements provided in cm unless otherwise noted.

Frame size number	Wheel size	A — Seat tube	B — Seat tube angle	C — Head tube length	D — Head angle	E — Effective top tube	F — Bottom bracket height	G — Bottom bracket drop	H — Chainstay length	I — Offset	J — Trail	K — Wheelbase	L — Standover	M — Frame reach	N — Frame stack
44 cm	700c	39.0	75.5°	9.0	70.6°	50.5	27.5	8.0	43.0	5.0	7.2	100.2	68.5	36.8	53.1
49 cm	700c	44.0	75.0°	10.0	71.4°	51.8	27.7	7.8	43.0	5.0	6.6	100.5	72.3	37.3	54.1
52 cm	700c	47.5	74.0°	12.0	71.7°	53.7	27.7	7.8	43.0	5.0	6.5	101.1	75.5	37.6	56.1
54 cm	700c	50.0	73.5°	13.5	71.8°	54.8	27.9	7.6	43.0	5.0	6.4	101.8	77.5	37.8	57.4
56 cm	700c	52.5	73.0°	15.0	72.2°	56.0	27.9	7.6	43.0	5.0	6.1	102.1	79.4	38.0	59.0
58 cm	700c	54.8	73.0°	17.0	72.3°	56.8	28.1	7.4	43.0	5.0	6.1	102.8	81.6	38.2	60.7
61 cm	700c	56.7	73.0°	20.0	72.6°	58.1	28.1	7.4	43.0	5.0	5.9	103.9	83.7	38.6	63.7

Trek Checkpoint AL 4 2019 Review

The Trek Checkpoint AL 4 (2019) is a versatile and affordable gravel bike designed for riders who enjoy exploring mixed terrains and want a reliable bike for both commuting and adventure riding. Here are some key points and thoughts about the Checkpoint AL 4 (2019):

Design and Build

• Frame Material: Trek Checkpoint AL 4 features an aluminum frame, known for its durability, affordability, and decent weight-to-strength ratio. The aluminum construction provides a stiff and responsive ride.
• Geometry: The bike’s geometry is optimized for gravel riding, offering a stable and comfortable riding position. It’s designed to handle a variety of surfaces, from paved roads to rough gravel trails.

Components

• Drivetrain: The bike is equipped with a Shimano Tiagra groupset, which is a reliable and cost-effective option. The Tiagra offers smooth and precise shifting, suitable for both casual rides and more intense gravel adventures.
• Brakes: It features mechanical disc brakes, which provide reliable stopping power and control in various weather conditions. While not as high-end as hydraulic discs, mechanical discs are easier to maintain and adjust.
• Wheels and Tires: The Checkpoint AL 4 comes with wide tires that enhance grip and stability on loose and uneven surfaces. The wheels are designed to be durable and capable of handling the demands of gravel riding.

Gravel-Specific Features

• Mounting Points: The bike includes multiple mounting points for racks, fenders, and bottle cages, making it versatile for bikepacking, commuting, and long-distance touring.
• Tire Clearance: It offers generous tire clearance, allowing for the use of wider tires which can improve comfort and traction on rough terrain.
• Comfort: The design incorporates features aimed at reducing rider fatigue, such as a carbon fork which helps absorb road vibrations.

Performance and Ride Quality

• Versatility: The Checkpoint AL 4 is built to handle a wide range of surfaces, making it a versatile choice for riders who want to explore different types of terrain. It’s equally capable on smooth pavement and rough gravel paths.
• Handling: The bike’s geometry and wider tires provide confident handling and stability, even on challenging surfaces. It strikes a good balance between comfort and performance.
• Comfort: With its relaxed geometry and features like the carbon fork, the Checkpoint AL 4 offers a comfortable ride, suitable for long-distance rides and all-day adventures.

Considerations

• Weight: While the aluminum frame is sturdy and relatively lightweight, the bike may be heavier compared to higher-end carbon gravel bikes. However, this is typical for bikes in this price range.
• Component Level: The Shimano Tiagra groupset, while reliable, is an entry-to-mid-level component. Riders looking for higher performance and lighter components might consider upgrading parts over time or looking at higher-tier models.

Overall Impression

The Trek Checkpoint AL 4 (2019) is an excellent entry-level gravel bike that offers a balance of durability, comfort, and versatility. It’s well-suited for riders who are new to gravel riding or those looking for a reliable and affordable bike for mixed-terrain adventures. Its design allows for ample customization and the ability to carry gear, making it a good option for bikepacking, commuting, and touring. If you seek a capable and adaptable bike that can handle a variety of riding conditions, the Checkpoint AL 4 is a solid choice.