Guide · Weight-stack adders
GymPin Original vs MiniPin vs KingPin: fit and stated limits
GymPin's three stack adders compared on pin diameter, plate end, approximate loading space and the load GymPin states, with the machine-first rule.
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Short answer
Choose by your selector pin diameter first, then by how many plates you want to add. The Original comes in 8 mm or 10 mm, the KingPin in 10 mm only, and the MiniPin is the small-increment option. GymPin states 60 kg for the Original and the KingPin, but your machine's own permitted load is the limit that counts.
GymPin Original
- Stack end: GymPin lists the small end, which goes into the weight stack, as 102 mm long in 8 mm (5/16 in) or 10 mm (25/64 in) diameter.[1]
- Plate end: 155 mm long and 49.5 mm in diameter, designed for 2-inch Olympic plates.[1] The 2 inches is the plate hole, not the stack end.
- Weight: about 864 g for the 8 mm version and 897 g for the 10 mm version.[1]
- Material: GymPin describes it as precision-machined aluminum and high-tensile steel, manufactured in the UK.[1]
- Stated load: GymPin's Original product page gives a maximum stated load of 60 kg.[1]
GymPin KingPin
The KingPin comes in 10 mm only, and GymPin states a 60 kg pin load rating for it.[2] GymPin's FAQ article says an 8 mm version would not be strong enough for its intended use.[3] If your machine uses 8 mm pins, the KingPin is not an option.
GymPin MiniPin
GymPin's FAQ article describes the MiniPin as offered in 8 mm and 10 mm and aimed at small increments, such as 1.25 or 2.5 kg plates.[3] We found no load figure for it in GymPin's pages.
Loading space, approximately
GymPin's FAQ article describes approximate loading space of about 3 inches (one plate) on the MiniPin, about 6 inches (about three plates) on the Original and about 8 inches (about four plates) on the KingPin.[3] These are rounded blog figures. The article itself says plate counts depend on plate thickness, so thick bumper-style plates will fit fewer.
| Model | Stack end | Loading space (approx.) | Load GymPin states |
|---|---|---|---|
| MiniPin | 8 or 10 mm | About 3 in, one plate | None found |
| Original | 8 or 10 mm, 102 mm long | About 6 in, about three plates | 60 kg on the product page |
| KingPin | 10 mm only | About 8 in, about four plates | 60 kg |
Reseller figures
A Micro Gainz listing describes the Original with a 6 1/8-inch aluminum body, a 4-inch steel insertion pin and about 10 1/8 inches overall.[4] Those numbers are close to GymPin's own, but use the maker's figures above. The same listing says the Original "holds up to 135lbs", which differs from the 60 kg on GymPin's product page.[4] Do not treat 135 lb as the GymPin rating.
The machine's limit comes first
GymPin states that its products do not certify or uprate a machine, that a stronger pin does not raise the machine's rating, and that the machine's permitted load takes priority.[2] A 60 kg pin on a machine with less headroom is limited by the machine. Read stack adders and machine load limits before you load one.
We could not verify a third-party review of GymPins, so nothing on this page relies on it.
Picks that fit2 products
8 mm machines: the GymPin Original listing here is the 8 mm Raw version. 10 mm machines: the KingPin (10 mm only).
More on choosing
Measure your selector pin before ordering. GymPin's stated 60 kg never overrides your machine's limit. On Amazon, check that 'Ships from / Sold by' shows Amazon.com or GymPin.
Adder for machines with an 8 mm selector pin
Adder for machines with a 10 mm selector pin
Next
Questions
Which GymPin fits my machine?
Measure your machine's selector pin first. The Original comes in 8 mm or 10 mm, the KingPin in 10 mm only, and GymPin's FAQ article says the MiniPin is offered in both. Never fit an 8 mm pin into a 10 mm hole.[1][2][3]
How much weight can a GymPin hold?
GymPin's Original product page states 60 kg, and GymPin states 60 kg for the KingPin. GymPin also says its pins do not uprate a machine, so your machine's own permitted load is the real limit.[1][2]
How many plates fit on a GymPin?
GymPin's FAQ article gives approximate loading space of about 3 inches (one plate) on the MiniPin, about 6 inches (about three plates) on the Original and about 8 inches (about four plates) on the KingPin. Plate thickness changes the count.[3]