Rims / hubs / wheel bearings - What does Stromer use?

Stromer uses different manufacturers for rims and hubs.

In older models, such as the ST1 V1, 36 V / ST1x, 6 & 12 V / ST2, 6 & 12 V, a Formula DC71 hub with a 100 mm x 15 mm thru-axle is installed on the front wheel.

Many models are fitted with rims and hubs from the Taiwanese manufacturer Alex Rims to the application.

On high-end models, such as the ST2S and ST5 of that time, as well as the current ST7, you'll find rims and hubs from DT Swiss. On the first two models, the lettering +STROMER- can be seen on older batches with DT Swiss rims.

With the ST3 Pinion, and also other models delivered from mid-2023 onwards, alongside AlexRims rims, you'll now also see rims from Rodi with a hub from Blackjack. Blackjack belongs to the Portuguese company Rodi, based in Aveiro. Incidentally, Blackjack hubs are compatible with those from AlexRims.Source)

Bearings for the following hubs are: (without guarantee)

ST1 year 2016
Thru axle: Formula DC71 (100mm x 15mm)
Bearing: DT 6903 hub bearing (18mm x 30mm x 7mm)

ST1x / ST2
On the ST1x and ST2, Stromer uses bearings that are permanently installed in the front wheel and cannot be replaced.

ST2 / Year 2016
XERO 18307 LBLU
6903-18 2RS = 18307-2RS | Ø18 x Ø30 x 7 mm
alternatively DT Swiss 6903 LBT / DT Swiss 1830

ST2S / ST5 / ST7
DT Swiss
6902 2RS = 15287-2RS | Ø15 x Ø28 x 7 mm

ST3 Pinion, 2023
HCH 6903-18 2RS from China Huanchi Bearing Ltd.
6903-18 2RS = 18307-2RS | Ø18 x Ø30 x 7 mm
alternatively DT Swiss 6903 LBT / DT Swiss 1830

ST3, ST3 Pinion, ST5 ABS...
Alex Rims / Blackjack
Org. TPI sc03t02lu = 6903-18 2RS = 18307-2RS | Ø18 x Ø30 x 7 mm
alternatively DT Swiss 6903 LBT / DT Swiss 1830

See also PROBLEMS - TIRES/WHEELS - 'Alternatives - 27.5″ rims'
See Wheel bearing replacement step-by-step on an ST5