# Rollerblade Hydrogen wheels 84 mm / 85A (8 pcs)

Rollerblade Hydrogen 84 mm / 85A (8 pcs) is a set of wheels for fitness and recreational skates whose frame takes 84 mm. Hydrogen polyurethane is abrasion-resistant and absorbs bumps, and 85A hardness gives grip on various surfaces. Eight wheels are enough for both four-wheel skates. The wheels suit beginners and advanced skaters alike.

- Price: 429.99 PLN
- Brand: Rollerblade
- Availability: temporarily unavailable
- EAN: 8050459450859
- Page: https://bogdanca.pl/en/rollerblade-hydrogen-wheels-84-mm-85a-8-pcs.html
- As of: 2026-10-23

## Who it’s for

- You have fitness or recreational skates on 84 mm wheels and the factory set is already worn down.
- You skate recreationally on paths and want wheels that wear more slowly.
- You want to replace all eight wheels at once so that they wear evenly.

## When to choose something else

- Your frame takes 80 mm at most — check the largest permitted diameter and choose [Hydrogen 80 mm](https://bogdanca.pl/en/rollerblade-hydrogen-wheels-80-mm-85a-8-pcs.html).

## Key features

- **84 mm diameter** — A size typical of fitness and recreational skates: it combines speed with manoeuvrability and stability.
- **85A hardness** — A durable tread with good grip on various types of surface.
- **Hydrogen polyurethane and core** — The compound is abrasion-resistant, and the core stabilises the wheel and helps to dampen bumps.
- **Set of 8** — A full replacement on a pair of four-wheel skates — four wheels per skate.

## Specifications

| Specification | Value |
|---|---|
| Brand | Rollerblade |
| Model | Hydrogen |
| Diameter | 84 mm |
| Hardness | 85A |
| Quantity | 8 (set for a pair of four-wheel skates) |
| Material | polyurethane |
| Intended use | fitness and recreational skating |
| Fits | fitness and recreational skates with room for 84 mm wheels |

## In the box

- 8 Rollerblade Hydrogen 84 mm / 85A wheels

## Questions and answers

### Will these wheels fit my skates?

Yes, if you have four-wheel skates with room for 84 mm wheels — this applies to most fitness and recreational skates of this diameter. Check the largest permitted wheel size on the frame.

### Are 8 wheels enough for a pair of skates?

Yes. Eight wheels is a full replacement on four-wheel skates — four wheels per skate.

### Are 84 mm / 85A wheels suitable for a beginner?

Yes. They are wheels for fitness and recreational skating, used by beginners and advanced skaters alike.

### How do they differ from the white/lime version?

In colourway. The 84 mm diameter, 85A hardness and number of wheels are the same — see [Hydrogen 84 mm / 85A white/lime](https://bogdanca.pl/en/rollerblade-hydrogen-wheels-84-mm-85a-white-lime-8-pcs.html).

### Can I return the wheels?

Yes, you have 14 days to withdraw from the contract (return) without giving a reason. The buyer covers the return shipping.

## Buying

- Delivery: from 15.00 PLN, in-store pickup in Poznań and Wrocław free of charge
- Returns: 14 days
- Seller: Bogdanca Sp. z o.o.