# Rollerblade Hydrogen Pro wheels 125 mm X-Firm (6 pcs)

Rollerblade Hydrogen Pro 125 mm X-Firm is 6 racing wheels for the track and the road: marathons, competitions and sporty skating on smooth, hard and dry asphalt. The two-layer M-TECH Dual-Pour combines a soft interior with a hard outer layer, and the Turbine Core with 9 spokes reduces vibration. Made in the USA, a set for a pair of 3 × 125 mm skates.

- Price: 779.99 PLN
- Brand: Rollerblade
- Availability: in stock, ships within 24 h
- EAN: 8050459819069
- Page: https://bogdanca.pl/en/rollerblade-hydrogen-pro-wheels-125-mm-x-firm-6-pcs.html
- As of: 2026-10-23

## Who it’s for

- You enter marathons and competitions, sometimes on the track and sometimes on the road, and want one set for both kinds of routes.
- You skate sportily on 3 × 125 mm skates, mainly on dry, even asphalt.
- You are looking for wheels faster than the Firm version, but with more margin of control than the hardest XX-Firm.

## When to choose something else

- Routes are sometimes slippery, uneven or worn – [Hydrogen Pro 125 mm Firm](https://bogdanca.pl/en/rollerblade-hydrogen-pro-wheels-125-mm-firm-6-pcs.html) will give more grip.
- Your frame is not designed for 125 mm wheels – see [frames](https://bogdanca.pl/en/skate-parts/frames) or smaller [skate wheels](https://bogdanca.pl/en/wheels-and-bearings/skate-wheels).

## Key features

- **X-Firm hardness** — On a smooth, hard and dry surface it gives high speed and stability while leaving a margin of control.
- **M-TECH Dual-Pour** — The soft inner layer improves grip, the hard outer one speeds up rolling and extends life.
- **Turbine Core with 9 spokes** — Reduces vibration and improves control at high speeds, which you will appreciate over a marathon distance.
- **125 mm diameter** — A large wheel carries a long way after each push and goes over small road bumps more calmly.
- **Made in the USA** — A polyurethane formula aimed at dynamic energy return and long-lasting performance.

## Specifications

| Specification | Value |
|---|---|
| Brand | Rollerblade |
| Model | Hydrogen Pro |
| Diameter | 125 mm |
| Hardness | X-Firm |
| Quantity | 6 (set for a pair of 3 × 125 mm skates) |
| Core | Turbine Core, 9 spokes |
| Technology | M-TECH Dual-Pour: soft inner layer, hard outer layer |
| Use | track and road, marathons, competitions, sporty skating; smooth, dry surfaces |
| Country of manufacture | USA |
| Bearings and spacers | not included in the set |

## In the box

- 6 Rollerblade Hydrogen Pro 125 mm X-Firm wheels

## Questions and answers

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

In hardness. X-Firm is in the middle: fast on dry, smooth asphalt, with a margin of control. Firm gives more grip on slippery and worn routes, and XX-Firm is the hardest and aimed at maximum roll.

### Are 6 wheels enough for a pair of skates?

Yes, for a pair of three-wheel 3 × 125 mm skates – three wheels per skate.

### Are bearings and spacers included?

No. The box contains 6 wheels only; you swap the bearings and spacers over from your old set or buy them separately.

### Are they suitable for both the track and the road?

Yes. This hardness is intended for track and road competitions, provided the surface is hard and dry.

### 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.