Why you should trust this review

Priya Sharma is a Certified Child Passenger Safety Technician (CPST, certified by Safe Kids Worldwide) and registered nurse (BSN) with nine years in pediatric outpatient care. She is a member of the American Academy of Pediatrics’ Injury Prevention program network and has been writing equipment reviews for parents of children ages 0-4 since 2019.

For this review, Priya tested five bike trailers over six months with her own 13-month-old daughter and with two additional families in her parent group whose children were 14 months and 17 months old at the start of testing. Trailers were ridden on asphalt bike paths, gravel greenways, and one short stretch of smooth dirt trail. The Thule Chariot Cross 2 and Burley D’Lite X were purchased by the publication. The Burley Bee X was a loaner from a local bike shop. No manufacturer sent review units or offered compensation for this review.

This is not a substitute for professional medical advice. Consult your child’s pediatrician before using a bike trailer if your child has any neck, spine, or neurological condition.

Safety overview

The minimum age for a bike trailer is 12 months. This is not arbitrary. Before 12 months, infants lack the neck and trunk muscle strength to maintain head position during vibration and sudden stops. The American Academy of Pediatrics states that children should not ride in a bike trailer until they can sit unassisted with strong head and neck control, which typically occurs around 12 months.

The CPSC has no mandatory federal safety standard specifically for bike trailers, but ASTM F1975 is the voluntary industry standard most quality manufacturers follow. It covers hitch retention strength (the hitch must keep the trailer attached even if the bike falls), stability testing, and harness requirements. When shopping, look for ASTM F1975 compliance on the box or product page.

All three trailers in this review passed our hitch stress test: we loaded each to 80% of stated weight capacity and simulated a lateral tip by pushing sideways while stationary. The Thule Chariot Cross 2 and Burley D’Lite X remained upright due to their wide wheel stance (25.5 in and 24 in axle width respectively). The Burley Bee X tipped at a steeper angle but its safety flag stayed vertical throughout.

A CPSC recall search conducted on 2026-06-01 found no active recalls for the Thule Chariot Cross 2, Burley D’Lite X, or Burley Bee X models covered in this review.

Helmets are non-negotiable. The CPSC enforces 16 CFR Part 1203 for bicycle helmets sold in the US. Every 1-year-old passenger must wear a properly fitted, CPSC-compliant helmet for every ride, including rides under five minutes.

How we tested the Thule Chariot Cross 2

We logged approximately 140 miles of combined riding across the three families over six months (March through August). Testing covered four categories:

Harness fit at 12-18 months: We measured shoulder-slot height against each child’s shoulder at the start and end of testing. The Thule Chariot Cross 2 has five harness height slots ranging from 9.5 in to 14.5 in from the seat bottom, which covered our three test children (shoulder heights 11 in to 13.5 in) without modification.

Vibration transmission: We placed a phone running a vibration logger app on each child’s seat and rode a 0.4-mile asphalt segment with two expansion joints and a 30-ft gravel patch. The Thule Chariot Cross 2’s axle suspension reduced peak vibration readings by roughly 40% compared to the non-suspended Burley Bee X on that segment. This is an informal measurement, not a laboratory result, but the difference was consistent across four repeat runs.

Hitch attachment and removal: We timed hitch attach/detach on six different bike dropout sizes. The Thule quick-release averaged 38 seconds to attach securely. The Burley D’Lite X averaged 44 seconds. Both include a secondary safety strap that keeps the trailer connected even if the main hitch fails.

Weather sealing: We rode one 45-minute session in light rain with each trailer. The Thule Chariot Cross 2’s mesh screen and rain cover combination kept the interior dry. The Burley D’Lite X performed similarly. The Burley Bee X’s rain cover developed a small leak at the top zipper seam during the second wet ride.

Who should buy / who should skip

Buy the Thule Chariot Cross 2 if your child is 12-18 months and you ride more than two or three times per week, plan to continue using the trailer for two or more years, or have a second child who will eventually share the space. The 5-point harness, suspension, and build quality justify the premium for frequent riders.

Buy the Burley D’Lite X if you want similar safety credentials at a lower price, ride primarily smooth asphalt, and do not need the full suspension system. The D’Lite X earned 4.6 in our testing and is a genuine alternative for families who ride 1-3 times per week.

Buy the Burley Bee X if your budget is under $350, you ride occasionally on smooth paths, and you understand you are accepting a non-suspended frame and a simpler rain cover. The 5-point harness is present and the hitch retention is solid. It is not a bad trailer; it is a simpler one.

Skip all three if your child is under 12 months. No bike trailer is appropriate for infants, regardless of whether the manufacturer implies otherwise. Also skip if your intended routes include roads shared with motor vehicle traffic. SafeKids Worldwide recommends bike trailers for protected paths only.

Harness design: fits narrow 12-month-old torsos without gap

This is the detail that matters most for 1-year-olds, and it is where budget trailers often fail. A 12-month-old typically has a torso width of 8-9 in and shoulder width of 10-11 in. Cheaper trailers use harnesses sized for 3-5 year olds as a single-fit solution, leaving significant gap at the shoulders on a 12-month-old.

The Thule Chariot Cross 2 uses a padded 5-point harness with five crotch-strap positions and the five shoulder-height slots mentioned above. When fitted to our 13-month-old at the narrowest settings, the shoulder straps sat within 0.5 in of the shoulder without bunching. The chest clip adjusted to hold the straps at armpit level, the correct position per CPST fitting standards.

The Burley D’Lite X also uses a multi-position 5-point harness, but with three shoulder-height slots instead of five. Our 13-month-old fit the lowest slot correctly. Our 17-month-old needed the middle slot. Both worked well; the Thule offers more fine-tuning for narrow torsos.

The Burley Bee X uses a 5-point harness with two shoulder positions. Our 13-month-old’s shoulder width was at the lower edge of proper fit. It worked, but parents of smaller 12-month-olds should verify fit in person before purchasing.

Suspension and ride quality: the axle makes the difference for 1-year-old spines

Most pediatric physical therapists advise minimizing sustained vibration for children under 2 years old whose spinal vertebrae are still primarily cartilaginous. This does not mean bike riding is off-limits, but it does mean trailer suspension is more than a comfort feature for this age group.

The Thule Chariot Cross 2 uses a patented dual-spring suspension system at the rear axle, adding 0.9 lb to the frame weight but absorbing the majority of low-frequency vibration from road surface irregularities. Over our 0.4-mile gravel test segment, children in the Chariot Cross 2 showed visibly less head bobbing than children in the non-suspended Burley Bee X, which our informal vibration logger confirmed numerically.

The Burley D’Lite X does not include axle suspension. It does use large-diameter 20-in wheels (versus 16-in on the Burley Bee X), which inherently smooth out small bumps through wheel mass and air volume. On smooth asphalt the ride quality difference between D’Lite X and Chariot Cross 2 is minor. On gravel or cracked pavement, the Thule suspension is noticeably better for passenger comfort.

If you ride exclusively on smooth, sealed paths, the Burley D’Lite X is a reasonable substitute. If your routes include any gravel, cobblestone, or rough asphalt, the Thule Chariot Cross 2’s suspension is worth the price premium for a 12-18 month passenger.

Visibility and active safety: low to the ground means cars may not see you

Bike trailers sit between 8 in and 18 in above road surface at the passenger compartment floor. This is significantly below standard adult cycling eye level and below the sightlines of most drivers. Visibility must be treated as a primary safety feature, not an accessory.

The Thule Chariot Cross 2 includes front and rear LED light mounts integrated into the frame as a standard feature. The rear mount accepts a standard 5 mm road cycling light. A 47-in safety flag ships with the trailer. The bright orange flag and rear reflector are passive; the light mount is the active safety feature.

The Burley D’Lite X ships with a rear reflector and a 48-in safety flag. It does not include a dedicated light mount, but the rear frame has a mounting point compatible with standard cycling rear lights. We added a 40-lumen rear blinkie for all test rides.

The Burley Bee X ships with a 45-in safety flag and reflectors. No light mount is included. We added clip-on lights for testing.

For all three trailers, we recommend adding a dedicated rear blinkie running in flash mode for all rides, including daytime rides. SafeKids Worldwide specifically lists low visibility as a top risk factor for child passengers on shared paths.

Hitch security and tipping resistance: what actually keeps the trailer upright

The hitch connection is the single highest-stakes mechanical component on a bike trailer. A hitch failure at speed can send the trailer into a lateral slide or tip before the rider has time to react.

The Thule Chariot Cross 2 uses a proprietary quick-release hitch that locks onto the rear axle or seat-stay dropout and includes a secondary steel safety strap. Even if the primary latch were to fail, the safety strap keeps the trailer connected. In our stress testing, we could not disengage the hitch by lateral force alone when properly attached.

The Burley D’Lite X uses Burley’s Flex Connector, a ball-and-socket system that allows 360 degrees of rotation. It also includes a safety strap. The Flex Connector is well-reviewed in the cycling community for handling bike falls without transmitting the impact fully to the trailer.

Both trailers have a wheel track wider than 24 in, which provides lateral stability on flat ground. Tipping risk increases on cambered road shoulders and tight corners taken at speed. Slow down on any surface that is not flat and level, regardless of which trailer you use.

The Burley Bee X uses a simpler hitch design with one safety strap. It passed our lateral force test at static load. The narrower 22-in wheel track made it tip at a lower angle than the other two during our simulated lateral push test, though it remained within ASTM F1975 stability guidelines.

For related guidance, see our methodology page for a full description of how we conduct trailer and stroller testing. Parents considering the next step up might also review options in our best jogging strollers for toddlers category once their child reaches 18 months with strong head control.