Impact test results – December 2025

W1 carbon rim
impact test results

See how a 25 mm internal, 50 mm deep, 334 g carbon rim performed across six progressively higher impact stages, with setup photos and test video.

Tested configurationW1 is the sample version tested here. The built wheel was tested without a tire. Results apply only to the configuration shown below.

Rim dimensions25 mm internal / 50 mm deep

Sample versionW1

Sample weight334 g

Hole count24

Spoke tension120 kgf

RevisionA1

Progressive impact test

Impact-test results

Six impact stages were recorded from 46 to 104 J, with the result shown at each stage.

6Impact stages

11.6 kgImpact-head mass

93 JHighest OK stage

104 JFirst crack observed

Stage	Baseline height	Lift height	Test height	Impact energy	Result
01	70 cm	110 cm	40 cm	46 J	OK
02	70 cm	120 cm	50 cm	58 J	OK
03	70 cm	130 cm	60 cm	70 J	OK
04	70 cm	140 cm	70 cm	81 J	OK
05	70 cm	150 cm	80 cm	93 J	OK
06	70 cm	160 cm	90 cm	104 J	NG — first crack

Report resultOK

OK through 93 J. At 104 J, the first visible crack was observed and the stage was recorded as NG. The wheel was tested without a tire using the recorded 11.6 kg impact head.

Confirmed test conditions: Built wheel, no tire fitted, 11.6 kg impact head, and six recorded stages from 46 to 104 J. Results apply only to the configuration and internal test record shown on this page.

UCI context: For industry comparison, 40 J is the UCI wheel-impact energy reference. The internal report also uses 40 J as its acceptance criterion and records this sample overall as OK. This page documents DeerCycles' internal validation; UCI approval is a separate, model-specific application process.

Impact-test footage

Impact-test fixture in operation

This factory video shows the built wheel and vertical impact-test fixture in operation.

Wheel conditionBuilt wheel held vertically in the fixture, with no tire fitted.

Impact head11.6 kg, as specified in the test report.

Test resultOK through 93 J; first crack observed at 104 J.

Test sequenceSix progressively higher impact stages.

Test documentation

Test setup and post-test wheel

The first image shows the built wheel, without a tire, in the vertical impact fixture. The second shows the wheel after the progressive test sequence.

Built carbon wheel positioned vertically in the impact-test fixture — Vertical impact fixture and built wheel

Built carbon wheel photographed after the progressive impact sequence — Built wheel recorded after the test sequence

The post-test wheel photo includes the original test-location markings.

Test scope

What these results cover

These results apply to the W1 sample shown above. Different rim profiles, target weights, wheel builds, revisions, or production batches require separate testing.

Check the specificationCompare the rim dimensions, weight, hole count, spoke tension, and revision with your target.

Confirm your use caseSet the intended use, wheel build, and market requirements before testing.

Plan production testingUse sample approval and batch inspection to confirm the production version.

Buyer questions

W1 impact-test FAQ

Which W1 rim configuration was tested?

The tested W1 sample had a 25 mm internal width, 50 mm depth, 24 spoke holes, 120 kgf spoke tension, and revision A1. It weighed 334 g and was tested in December 2025.

What were the impact-test results?

The wheel was tested without a tire using the recorded 11.6 kg impact head. The sample remained OK through 93 J. At 104 J, the first visible crack was observed and the stage was recorded as NG. For industry context, 40 J is the UCI wheel-impact energy reference. The internal report also uses 40 J as its acceptance criterion and records this sample overall as OK. This page documents DeerCycles' internal validation; UCI approval is a separate, model-specific application process.

Do these results apply to every W1 rim?

No. The results apply only to the configuration shown here. Different rim profiles, target weights, wheel builds, revisions, or production batches require separate testing.

Plan your rim validation

Share your rim profile, intended use, target weight, wheel build, and market requirements. We'll help define the right sample and test plan before production.

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W1 carbon rim impact test results