Your needs, this model
Does it fit your priorities?
Does the observed Trace Mips S/M chart include a 56 cm circumference?
Yes. Bell's exact style-156 chart puts S/M at 50–57 cm and M/L at 53–60 cm, so 56 cm lies inside both rows. The observed Matte Red/Black SKU BL-7139275 is S/M; the overlap is not a recommendation to choose one size or a personal fit result.
Explore this need in the finder →Does Bell's exact Trace Mips page state US CPSC compliance?
Yes. Bell states that this model complies with the US CPSC bicycle-helmet standard for persons age five and older. That is model-page wording, not inspection of the physical label on a seller's exact unit or proof of a child-specific fit.
Explore this need in the finder →Does Trace Mips meet the finder's Spherical / Mips requirement?
No. The exact page names Mips Evolve, while the finder requires Bell/Giro's separately documented Spherical Technology powered by Mips. The Trace review therefore does not treat one Mips label as another design.
Explore this need in the finder →This assessment covers Bell Trace Mips US style 100000000200000156 in Matte Red/Black / S/M, SKU BL-7139275, the configuration in Bell's recorded Road and Gravel directory row. It is based on Bell's exact product-page details, chart and published feature descriptions, not on a ride, test, fit session or inspection of a physical helmet.
What the exact page does—and does not—say about use
Bell describes Trace Mips for fitness rides, adventure rides and family rides around the neighborhood, calling it an all-around model. The observed product also sits in Bell's US Road and Gravel catalogue. Those sources support a road/gravel-category comparison in this library; they do not by themselves establish urban commuting, technical mountain trails, downhill use, BMX riding or a child-specific fit plan. “All-around” is the manufacturer's description, not evidence that this helmet suits every discipline or rider.
Read the size chart as a first filter
The exact Matte Red/Black style page offers S/M and M/L selectors. Its chart gives Universal Women's & S/M as 50–57 cm and Universal Adult & M/L as 53–60 cm. Those rows overlap from 53 through 57 cm. For example, 56 cm lies in both published ranges; that does not say which size an individual should buy. The saved observed unit is the S/M SKU, not a measurement or fit result for any reader.
The same page's chart also displays a Universal XL row of 58–63 cm. However, the selected Matte Red/Black page only exposes S/M and M/L, and this edition's observed row contains no XL SKU. I preserve the XL line as an unresolved chart-to-selector bridge and do not use it to extend the numeric finder range for this exact observed configuration. That limitation should not be silently repaired by assuming an XL product variant is available in the recorded color.
Bell's general fitting guide recommends measuring around the head with a flexible tape about an inch above the eyebrows, checking the exact product chart, and then trying the helmet on. It describes a level position, secure straps and stability checks. Treat the chart as a reason to test the exact helmet in person; it cannot account for every head shape, pressure point or retention preference, and this review does not determine individual fit.
Mips Evolve is not the narrower Spherical filter
Bell names Mips Evolve and describes a low-friction layer integrated with the retention system. Its product copy says the arrangement is designed to reduce rotational forces in certain impacts. Those are manufacturer statements, not a comparative crash result or guarantee of reduced injury. Trace Mips does not document Bell's separate Spherical Technology powered by Mips, so a finder choice requiring that specific architecture excludes it. Keeping those product names distinct avoids treating any Mips-marked model as interchangeable with a named Spherical design.
The page also lists an Ergo Fit dial, No-Twist Tri-Glides and a Sweat Guide pad. Bell presents the dial as an adjustment system, the tri-glides as quick-adjust strap fasteners, and the pad as a design intended to direct sweat away from the brow area and eyewear. They may be useful points to examine during a try-on, but the page is not an independent test of adjustment range, strap security, comfort, eyewear compatibility or sweat management.
Standards and weight need their own context
Bell's exact US page states that Trace Mips complies with the US CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and Older. That is enough for this library's manufacturer-statement filter. It is not a physical-label inspection of the observed SKU or a certification check of a seller's unit, and an age-five-plus statement does not establish a child-specific fit.
Bell lists 325 g for size M/L. The observed Matte Red/Black unit is S/M, so I do not transfer that manufacturer figure to it. The page does not provide a separate S/M weight here. Bell describes the helmet as better ventilated, but the captured material gives no numeric vent count, airflow measurement or cooling comparison. Neither the M/L mass nor ventilation language can stand in for a measured ride experience.
Where the record is thin
The product evidence reviewed here does not establish a documented head-shape profile, model-specific fit instructions, independent impact results, removable chin-bar capability, or a child riding plan. The saved Bell and CPSC recall notices checked by model name on 2026-11-01 did not list Trace Mips among the displayed affected models, but this narrow screen is not a full recall search or clearance of a particular serial number. It cannot speak to later notices, prior crashes, authenticity, storage or the condition of a used helmet.
Who should keep it in the comparison?
Trace Mips is a reasonable documentation-based candidate for a shopper comparing Bell's road/gravel-category options, an explicitly named Mips Evolve system, and the selected S/M or M/L chart rows. The 53–57 cm overlap makes a try-on particularly important, not less. It is not the evidence-backed choice for someone who requires Spherical/Mips, a documented urban or trail activity, confirmed XL availability in Matte Red/Black, a particular child fit, an individual unit's verified label, or an exact measured weight for S/M.
Before considering an offer, match style 156, the Matte Red/Black finish and intended size to the listing; confirm the physical model label and package; consult the current instructions; and check the seller's return terms and current safety notices. Do not substitute a neighboring Bell Trace color or another Bell model's feature list without checking its own page. No price, stock status, seller quality, rating, or customer experience is asserted here.
Key specifications
Key details at a glance
| Helmet style | Half-shell |
|---|---|
| Listed fit sizes | S/M / M/L |
| Published circumference floor | 50 cm |
| Published circumference ceiling | 60 cm |
| US CPSC compliance stated | Yes |
| Rotational-impact design | Mips Evolve |
| Fit adjuster | Ergo Fit |
| Fit adjustments described | Bell describes a lightweight Ergo Fit system with a rubber-overmolded adjustment dial integrated with Mips; there is no individual retention or head-shape assessment here. / The exact page lists No-Twist Tri-Glides as quick-adjust fasteners intended to help keep the straps flat and positioned. This is a product-feature statement, not a strap-retention test. / Bell describes its Sweat Guide pad as directing moisture away from the brow pad and eyewear. No independent comfort, sweat or eyewear-fit test was performed. |
Use the exact model’s instructions for operating limits, supplied equipment and version differences.
Sources for this review
Sources for this assessment
- Bell US Road and Gravel directory observation containing Trace Mips style 100000000200000156, Matte Red/Black / S/M, SKU BL-7139275
- Bell exact US Trace Mips style-156 page, selected Matte Red/Black / S/M, SKU BL-7139275
- Trace Mips chart embedded on Bell's exact style-156 US product page
- Bell manufacturer image served from the exact selected Trace Mips style-156 Matte Red/Black US page
- Bell US guide to measuring, trying on and fitting a bicycle helmet
- Bell Bicycle Helmet Owner's Manual Part B5000433-F; general bicycle-helmet fit, care and replacement guidance, not a Trace-specific setup manual
- Bell US helmet-recall notice screened by model name on 2026-11-02; not an individual-unit clearance
- CPSC Bell Sports bicycle-helmet recall 25-359; affected-model notice screen checked by name, not an individual-unit clearance
Compare the model with your own constraints
A model assessment cannot decide fit by itself. Use the finder to combine riding use, head circumference and documented features, then verify the exact helmet and instructions.
