# Rollerblade Hydrogen Pro wheels 110 mm X-Firm (8 pcs)

Rollerblade Hydrogen Pro 110 mm X-Firm is a set of 8 wheels for speed skates, made in the USA. The two-layer M-TECH Dual-Pour construction combines softer polyurethane inside with harder polyurethane outside, and the turbine core with 9 spokes damps vibration at high speed. They work best on a dry, smooth surface: track, marathon, fast city skating. Bearings and spacers are not included in the set.

- Price: 779.99 PLN
- Brand: Rollerblade
- Availability: temporarily unavailable
- EAN: 8050459819038
- Page: https://bogdanca.pl/en/rollerblade-hydrogen-pro-wheels-110-mm-x-firm-8-pcs.html
- As of: 2026-10-23

## Who it’s for

- You enter marathons or track races and need wheels that return the energy of your push well.
- You skate fast around town on 4 × 110 mm skates and want to replace the whole set at once.
- You train mainly on dry, even asphalt, but do not want wheels that lose grip straight away when the route gets worse.

## When to choose something else

- You often skate on slippery, uneven or worn asphalt – Firm hardness will give more grip, e.g. [Hydrogen Pro 110 mm Firm](https://bogdanca.pl/en/rollerblade-hydrogen-pro-wheels-110-mm-firm-8-pcs.html).
- You skate recreationally at a relaxed pace – in the [skate wheels](https://bogdanca.pl/en/wheels-and-bearings/skate-wheels) section you will find urban and fitness models.

## Key features

- **X-Firm hardness** — The middle hardness in the Hydrogen Pro series, between Firm and XX-Firm: fast rolling on dry, smooth asphalt and a margin of grip when conditions are worse.
- **Two-layer M-TECH Dual-Pour construction** — The softer inner ring works under load and improves grip in turns, while the harder outer layer provides stiffness and speed.
- **Turbine core with 9 spokes** — Limits vibration and stabilises the wheel, so it is easier to stay in control at high speed.
- **110 mm diameter** — A large wheel rolls longer after a single push, which matters over a long distance and in a marathon.
- **Made in the USA** — The polyurethane compound is aimed at high energy return and a long life, even with intensive training.

## Specifications

| Specification | Value |
|---|---|
| Brand | Rollerblade |
| Model | Hydrogen Pro |
| Diameter | 110 mm |
| Hardness | X-Firm |
| Quantity | 8 (set for a pair of 4 × 110 mm skates) |
| Core | turbine, 9 spokes |
| Technology | M-TECH Dual-Pour: softer inner layer, harder outer layer |
| Use | track racing, marathons, fast urban skating; best on dry, smooth surfaces |
| Country of manufacture | USA |
| Bearings and spacers | not included in the set |

## In the box

- 8 Rollerblade Hydrogen Pro 110 mm X-Firm wheels

## Questions and answers

### How does X-Firm differ from Firm and XX-Firm?

In hardness. Firm is the softest variant, with the most grip on slippery and worn surfaces; X-Firm is for dry, smooth roads; XX-Firm is the hardest version, aimed at maximum roll on straights.

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

Yes, for a pair of 4 × 110 mm skates – four wheels per skate. For three-wheel 3 × 110 mm skates you need 6 pieces.

### Are bearings and spacers included?

No. The set is 8 wheels only; you can swap the bearings and spacers over from your old wheels or buy them separately.

### Can I skate on them on wet asphalt?

Yes, but that is not their main job. X-Firm works best on a dry, smooth surface; if you often skate on slippery or damaged asphalt, choose Firm hardness.

### 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.