The 503X is the complete redesign of our flagship aluminium hardtail. We rethought the details, and tested the bike on the best MTB trails in the Dolomites. The 503X meets the needs of a wide mountain bike audience, getting more people off-road and into the mountains.
The 6061 double butted aluminum frame incorporates the latest advances in the offroad field:
- Tapered Head tube: 1 ½" bottom, 1 ⅛" top
- Integrated cables
- Press fit bottom bracket 92 mm
- Seatpost 27.2 mm diameter
- Direct mount Derailleur
- Thru-axle rear dropout: 142 x 12mm
The 503X is available with 29" wheels in 4 sizes: S, M, L, and XL.

Telaio	Alluminio
Sospensioni	Hardtail, 100mm
Forcella	RockShox Reba
Ruote	29″ Alluminio
Trasmissione	1 × 12
Gruppo	XT, Deore
Freni	Shimano Disco idraulici

Telaio	ALU 6066/6061 DOUBLE BUTTED Standard BB: BB86/BB92, Movimento Centrale
Forcella	ROCK SHOX REBA RL, 100 mm Escursione: 100mm Tipo di molla: Aria
Bottom Bracket	SHIMANO PRESSFIT MT500-PA
Auricolare	RITCHEY COMP PRD15862
Stem	PROMAX DA282
Manubrio	PROMAX HB-3018
Sella	PROLOGO KAPPA

Deragliatore posteriore	SHIMANO XT 1X12 RD-M8100-SGS
Deragliatore anteriore	-
Manovella	SHIMANO FC-MT510 32T
Leve del cambio	SHIMANO DEORE M6100-R
Cassetta	SHIMANO SLX 12S CS-M7100-12 10-51T
Catena	SHIMANO SLX CN-M7100 118 LINK
Freni	SHIMANO MT401 Tipo: Shimano Disco idraulici

Cerchi	SHIMANO MT501
Pneumatici	VITTORIA BARZO 29" X 2.25 RIGID
Dischi	SHIMANO RT30 180 mm / 160 mm

2023 Wilier503X RACE

2023 Wilier
503X RACE