First-Party Test · WT-1.0

Custom Shin Guard Weight: Measured Grams Per Guard

Every size SAIWEI SPORTS sells was weighed as a physical production sample. Two guards were weighed per size, each guard separately, and both individual readings are published below rather than a single summary figure. Weight is recorded per guard — not per pair.

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Status: Published Method: WT-1.0 Recorded: Sep 16, 2026 Sample: 34 guards, 17 sizes

Evidence Record 6 of 8 recorded · 2 partial

01 Exact sample Recorded 34 identified guards, sample IDs listed in the table below
02 Actual equipment Partial Instrument type recorded; model and calibration record not recorded
03 Test conditions Recorded Per-guard weighing; EVA state and ambient readings in frame
04 Repeat count Recorded 2 guards per size, weighed separately, both values retained
05 Raw measurements Recorded Both individual readings published, not only the mean
06 Visible limitations Recorded Limitations register shown beside the result
07 Photos / video Partial Sample-identification and session photographs retained; instrument readout not photographed
08 Date & method version Recorded WT-1.0, recorded 2026-09-16

Publication note: Published with two documentation gaps recorded in the evidence gate: the scale model / calibration is not recorded, and the instrument readout was not photographed. The measurement itself is complete and reproducible from the sample log.

What Was Measured

Mass of one guard, in g.

One complete guard as shipped. Every row — Carbon Fiber Classic, Carbon Fiber Ultra and PP plastic alike — is weighed with the bonded EVA foam layer in place, so the three lines share one construction basis.

Select one physical guard of the size being recorded and read its sample ID label.

Place that single guard on the gram scale, with the EVA foam layer attached on carbon rows.

Record the stable reading in grams, to the precision shown.

Repeat on a second guard of the same size and record the second reading separately.

Retain both individual readings; the mean column is derived from them and is not a substitute for them.

Equipment

InstrumentGram scale (digital)

ModelNot recorded

ResolutionReadings recorded to 0.1 g

CalibrationNot recorded

The instrument model and calibration record are not part of this evidence set, so they are shown as Not recorded rather than estimated.

Conditions

Sample stateProduction samples, as received

Components includedFinished guard with the bonded EVA foam layer in place, on every material line.

Reading takenOne guard at a time

Ambient conditionsThermo-hygrometer visible in the session photographs reads 58% RH at 26 °C and 56% RH at 26 °C

Repeats: 2 guards weighed separately, per size.

Measured Data

Every reading, not just the average.

Both individual readings are published on the row they belong to. The mean is derived from those two values and is shown for convenience only — a figure that cannot be traced back to a reading on this page is not evidence.

Carbon Fiber Classic

8–32 g

7 sizes · 14 guards weighed

Carbon Fiber Ultra

35–60 g

2 sizes · 4 guards weighed

PP Plastic

12–91 g

8 sizes · 16 guards weighed

Sample log — all sizes

Individual per-guard weight readings for all 17 sizes across the three product lines, in grams. 34 guards weighed, two per size. Means are derived from the two readings shown on the same row. The two readings are published to 0.1 g as recorded; the mean is rounded to the nearest whole gram, so it can differ from the exact average of the pair by up to 0.5 g. Every row is weighed on the finished guard with the bonded EVA foam layer in place, so the carbon and PP figures share one construction basis. The mean is the expected value for its size and is nominal: through production tolerance an individual guard can weigh up to ±5 g either side of the figure shown.

Per-guard weight readings by size, in grams.
Material	Size	Sample ID	Reading 1 (g)	Reading 2 (g)	Mean (g)	Construction
Carbon Fiber Classic	Super Mini	CFSM01 / CFSM02	8.8	9.6	9	With EVA foam
Carbon Fiber Classic	Mini XS	CFMXS01 / CFMXS02	7.7	7.8	8	With EVA foam
Carbon Fiber Classic	Mini S	CFMS01 / CFMS02	10.6	10.4	11	With EVA foam
Carbon Fiber Classic	Junior	CFJ01 / CFJ02	16.5	16.9	17	With EVA foam
Carbon Fiber Classic	S	CFS01 / CFS02	20.1	19.2	20	With EVA foam
Carbon Fiber Classic	M	CFM01 / CFM02	25.4	27.5	26	With EVA foam
Carbon Fiber Classic	L	CFL01 / CFL02	32.5	32.3	32	With EVA foam
Carbon Fiber Ultra	Ultra S	CFUS01 / CFUS02	35.1	34.1	35	With EVA foam
Carbon Fiber Ultra	Ultra L	CFUL01 / CFUL02	59.3	60.9	60	With EVA foam
PP Plastic	Super Mini	PPSM01 / PPSM02	15.1	15.2	15	With EVA foam
PP Plastic	Mini XS	PPMXS01 / PPMXS02	12.1	12	12	With EVA foam
PP Plastic	Mini S	PPMS01 / PPMS02	17.8	17.9	18	With EVA foam
PP Plastic	Junior	PPJ01 / PPJ02	27.5	27.6	28	With EVA foam
PP Plastic	S	PPS01 / PPS02	35.5	35.6	36	With EVA foam
PP Plastic	M	PPM01 / PPM02	51.5	51.6	52	With EVA foam
PP Plastic	L	PPL01 / PPL02	63.7	63.8	64	With EVA foam
PP Plastic	XL	PPXL01 / PPXL02	91.2	91.4	91	With EVA foam

Each row is one size: the Sample ID cell names both guards that were weighed, and Reading 1 and Reading 2 are that pair, in the order listed. Measurements are first-party readings taken from production samples. Published figures are nominal: actual weight may differ from the value shown by up to ±5 g per guard and each dimension by up to ±3 mm through production tolerance, and further with batch and storage time.

Reading The Data

What these numbers do and do not say.

Weight is recorded per single guard. A pair weighs roughly twice the figure shown; the per-guard number is the measured quantity.
Every reading is taken on the finished guard with the bonded EVA foam layer in place, carbon and PP plastic alike, so the figures share one construction basis. A carbon-versus-PP difference is therefore not explained by one side being a bare shell.
Within each product line the reading rises with size, and the size selected moves the figure more than the material choice does.
The three lines do not share one size run: carbon classic has no XL, Carbon Ultra exists only in S and L, and PP plastic has all eight sizes. Even at a shared size label the measured width differs, so a size-matched row is not a like-for-like object.
The published mean is nominal, not a per-unit guarantee. It is the expected value for the size; the row says nothing about the individual guard that ships. Through production tolerance a guard can sit up to ±5 g either side of the figure shown, and each dimension up to ±3 mm.

The table on this page and the downloadable CSV are two views of the same measurement record. This test publishes those readings; it does not restate them.

Limitations register

Shown beside the result, not in fine print.
Limitation	Effect on interpretation
n = 2 guards per size, from single-factory production samples	Supports a per-size reading, not a statistical tolerance or a batch average. Individual guards of one size can differ from each other.
EVA foam is included on every row, but the foam spec is not recorded per line	The construction basis matches across carbon and PP, so a difference is no longer explained by one side being a bare shell. Foam grade and thickness were not measured separately, so a difference still cannot be attributed to the shell material alone.
Scale model and calibration record are not recorded; instrument not photographed	The readings are traceable to a sample and a session but not to a documented instrument. Treat the figures as production readings rather than certified laboratory values.
Sizes are not dimensionally matched across product lines	Rows that share a size name still differ in measured width, and the lines do not share a size run. Read the figure with its own size row, not as a like-for-like material comparison.
Single factory; PP plastic rows revised after the carbon rows were read	No cross-batch, cross-site or storage-age variance is captured here, and the three product lines were not all read in one sitting.
Published figures are nominal: ±5 g per guard on weight and ±3 mm per dimension	The value on a row is the expected value for that size, not a weight the unit that ships is guaranteed to match. A given guard can weigh up to 5 g either side of the figure shown, so read the row as the size expectation and not as a per-unit promise.

Photographic Record

Which guards were measured, and when.

These photographs document which physical guards were measured and the conditions visible at the time. They are not a photograph of the weight reading itself — no photograph of the scale readout was retained, which is why evidence gate item 07 is shown as partial.

The sample set

Carbon fiber shin guards laid out in size order, each carrying a white label printed with its model number such as CFSM01, CFMS01 and CFL02. — Sample identification. Each carbon guard carries a white model label, and those labels are the Sample ID values in the table above — so every published reading can be traced back to one physical guard. Source file: 6.png

Carbon fiber, Carbon Ultra and PP plastic shin guards arranged together on a bench with a steel tape measure and a small digital readout in frame. — The three product lines side by side. Carbon Ultra (wider, two sizes only) and PP plastic have their own size runs, so this is the full set that was weighed. Source file: 4.png

Translucent frosted PP plastic shin guard shells laid out in two rows beside a steel tape measure. — PP plastic sample set by size, photographed as bare shells. In the weight table these are recorded as finished guards with the EVA foam layer in place — the same basis as the carbon rows. Source file: 1.jpg

Session records

Two small carbon fiber shin guards labelled CFSM01 and CFSM02 on a bench, with a digital vernier caliper and a digital thermo-hygrometer reading 58 percent and 26 degrees Celsius. — Session record for the Super Mini carbon pair, CFSM01 and CFSM02 — the same two guards whose 8.8 g and 9.6 g readings appear on one table row. The thermo-hygrometer in frame reads 58% RH at 26 °C. Source file: 1Q5A4565.JPG

Two carbon fiber shin guards labelled CFS01 and CFS02 on a bench with a digital vernier caliper in frame. — Session record for the size S carbon pair, CFS01 and CFS02, corresponding to the 20.1 g and 19.2 g row. Source file: 1Q5A4566.JPG

A PP plastic shin guard labelled PPJ02 on a bench with a digital vernier caliper and a thermo-hygrometer reading 56 percent and 26 degrees Celsius. — Session record for PP plastic Junior sample PPJ02. The thermo-hygrometer in frame reads 56% RH at 26 °C. Source file: 1Q5A4567.JPG

Test FAQ

Questions about this test.

Answers are limited to what the recorded evidence supports.

How do you test shin guard weight?

A single identified guard is placed on a gram scale and the stable reading is recorded in grams. The process is repeated on a second guard of the same size, and both individual readings are kept. A carbon-versus-plastic conclusion is only drawn when the samples and the measurement conditions are comparable. Both lines are now weighed on the same construction basis — finished guard with the bonded EVA foam layer in place — but they still do not share identical dimensions at a shared size label.

Is the published weight for one guard or for a pair?

One guard. Two guards were weighed per size and each reading is published separately. A pair weighs roughly twice the figure shown on the row. Pair weight used by the cart is derived from the same readings but is a shipping quantity, not a test result.

Why does the same size weigh differently in carbon fiber and PP plastic?

Because they are not the same object. Both are now weighed as finished guards with the bonded EVA foam layer in place, so construction is no longer the difference. What remains is size and material: the two lines differ in measured width even at a shared size label, their shells differ in material and thickness, and PP plastic carries an XL that carbon classic does not. The row shows the guard that was actually weighed.

Can I compare the carbon and PP plastic figures directly?

Within the limits recorded on this page, and not as a like-for-like material comparison. Different construction, different dimensions and a different component scope all move the number alongside the material. The limitations register states exactly what each difference does to the interpretation.

What scale was used, and is it calibrated?

The method states a gram scale and the readings are recorded to 0.1 g. The instrument model and its calibration record are not part of this evidence set, so they are shown as Not recorded rather than stated as fact. That gap is listed in the evidence gate and in the limitations register.

How many guards were weighed in total?

Thirty-four: two guards for each of the seventeen sizes across the three product lines. That is 18 carbon guards (14 Carbon Fiber Classic, 4 Carbon Ultra) and 16 PP plastic guards.

Are the published weights exact per-unit figures?

No. Every figure is nominal rather than a per-unit guarantee. The published manufacturing tolerance is ±5 g per guard on weight and ±3 mm on each dimension, so two guards of the same size can differ from the row and from each other. Read the figure as the expected value for that size.

Use the Data, Then Choose

The measured weight is one input. Sizing, construction and the coverage you want decide the rest.

See Custom Carbon Fiber Check the size guide