# Rollerblade Hydrogen wheels 90 mm / 85A (8 pcs)

Rollerblade Hydrogen 90 mm / 85A (8 pcs) is a set of eight wheels for fitness and recreational skates with room for 90 mm — four per skate. The 90 mm diameter combines speed with stability and manoeuvrability, and 85A hardness gives a durable tread and grip even on an uneven surface. Hydrogen polyurethane is abrasion-resistant.

- Price: 449.99 PLN
- Brand: Rollerblade
- Availability: temporarily unavailable
- EAN: 8050459450842
- Page: https://bogdanca.pl/en/rollerblade-hydrogen-wheels-90-mm-85a-8-pcs.html
- As of: 2026-10-23

## Who it’s for

- You do fitness skating at a brisk pace and have four-wheel skates with a frame for 90 mm.
- You get around the city on skates and want wheels that wear slowly.
- You are replacing a worn set and want all eight wheels from the same series.

## When to choose something else

- Your frame takes 84 mm at most — check the largest permitted diameter and choose [Hydrogen 84 mm](https://bogdanca.pl/en/rollerblade-hydrogen-wheels-84-mm-85a-8-pcs.html).

## Key features

- **90 mm diameter** — A balance between speed, stability and manoeuvrability — a size for energetic fitness skating.
- **85A hardness** — The tread lasts a long time, keeps its grip and stays comfortable even on an uneven surface.
- **Hydrogen polyurethane and core** — The compound is abrasion-resistant, and the precisely made core makes the wheel roll smoothly.
- **Set of 8** — You replace all the wheels on four-wheel skates at the same time — four per skate.

## Specifications

| Specification | Value |
|---|---|
| Brand | Rollerblade |
| Model | Hydrogen |
| Diameter | 90 mm |
| Hardness | 85A |
| Quantity | 8 (set for a pair of four-wheel skates) |
| Material | polyurethane |
| Intended use | energetic fitness skating, city skating |
| Fits | fitness and recreational skates with room for 90 mm wheels |

## In the box

- 8 Rollerblade Hydrogen 90 mm / 85A wheels

## Questions and answers

### Will these wheels fit my skates?

Yes, if you have four-wheel skates with room for 90 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 skates with four wheels under each foot.

### How do they differ from Hydrogen 84 mm?

In diameter. A 90 mm wheel is faster and rolls better over bumps, but it requires a frame with room for this size; you can find the smaller one here: [Hydrogen 84 mm / 85A](https://bogdanca.pl/en/rollerblade-hydrogen-wheels-84-mm-85a-8-pcs.html).

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

In colourway. The 90 mm diameter, 85A hardness and number of wheels are the same — see [Hydrogen 90 mm / 85A white/lime](https://bogdanca.pl/en/rollerblade-hydrogen-wheels-90-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.