Measured in both.

KGKM makes equipment for athletes who count both kilos and kilometers. The first product is S-01, a performance sock for races that mix running with sleds.

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S-01 performance sock

In development. Nothing here is for sale yet. This is what we are building and how each part will be tested. Results fill in as tests are run.

Tests published
0
S-01 status
In development
Page updated
S-01 design targets and their test status
What we are building How we will test it Result
Grip print under the forefoot Pull test inside the shoe under 20 kg (TEST 001) Not measured yet
Grip that survives washing The same pull test after 30 washes Not measured yet
No hot spots over 8 km Wear test at race distance Not measured yet
Padded zone for the ankle timing chip Fit check with a chip strap Not built yet

Every test, with its method

TEST 001 In-shoe slip

Not run yet

How much force does it take before a foot slides inside the shoe? We will measure it for a regular running sock, a grip sock when new, and the same grip sock after 30 washes.

The setup follows the friction test in a 2022 study of grip socks in the Journal of Sports Sciences.

What this test will not show: race times. We have not measured them.

  1. Clamp a running shoe to the bench.
  2. Put a foot form wearing the sock inside the shoe, with 20 kg on top.
  3. Pull the foot form forward with a digital force gauge.
  4. Record the force when it starts to slide. Repeat 5 times and average.

Three rules

Numbers first
Every claim comes with a number and a unit.
Only what we tested
We publish the method, and we say what we did not test.
Metric
Kilos and kilometers, because that is how the races are measured.

Questions

What is KGKM?

KGKM is an independent sports equipment brand for athletes who count both kilos and kilometers: people who run and lift. The name is the two units, KG and KM. Say it letter by letter: K-G-K-M.

What is S-01?

S-01 is a performance sock with silicone grip print under the forefoot. It is in development and is not for sale yet. Join the list to get the first test result.

Is S-01 made for HYROX?

S-01 is being built for hybrid fitness races that combine running with loaded stations, such as HYROX: 8 km of running and 8 workout stations in one race. KGKM is independent. It is not affiliated with, sponsored by or endorsed by HYROX. For what the rulebook allows and what each station asks of your kit, read the gear guide for HYROX races.

What does a grip sock do?

When you push a sled, your forefoot drives against the inside of the shoe and can slide. Grip print adds friction between the sock and the insole. TEST 001 will measure how much. It has not been run yet.

How does KGKM test its products?

Every claim gets a test with a published method. For TEST 001 we clamp a shoe to a bench, load a foot form with 20 kg, pull it with a force gauge and record the force when it starts to slide, 5 times. We also say what a test does not show.

When can I buy S-01?

There is no date yet. S-01 goes to sampling in three grip layouts, and the layout that tests best goes forward. The list gets the results first.