Sonic EVA AM SX 2024
How current the bike is — newer chassis, motor and battery score higher. 10 = brand-new, 0 = legacy.
The Bulls Sonic EVA AM SX is the women's-specific (Diamant frame) version of Bulls' light-assist all-mountain platform, built around the lightweight Sonic carbon chassis with 140 mm of fork travel and 130 mm at the rear. It pairs the compact Bosch Performance Line SX motor with a slim 400 Wh Bosch CompactTube battery, so it slots into the lightweight trail category rather than full-power enduro. The women's tuning shows up in the 165 mm cranks, prologo Proxim 400 wide saddle and BULLS riserbar.
It was sold as a single trim, the SX 1, at 5,999 EUR. The build is sensibly value-led rather than flashy: a Shimano Deore 12-speed mechanical drivetrain, Shimano BR-MT420 four-piston hydraulic brakes on 203 mm rotors front and rear, Mavic E-Crossride wheels and Schwalbe Wicked Will / Nobby Nic tyres. A 150 mm LIMOTEC dropper and integrated MonkeyLink lighting round out a practical specification.
Geometry is moderate for the segment, with a 65.5 degree head angle, 75 degree effective seat angle and 450 mm chainstays across all three sizes (S to L). Reach runs 420 to 470 mm, giving a balanced trail feel rather than an aggressive enduro stance. Claimed weight is 19.9 kg.
This is a discontinued 2024 model. The 400 Wh battery is removable and can be supplemented by an optional 250 Wh range extender, and Bulls notes a free Bosch Performance Upgrade from autumn 2025 that raises the SX motor to 60 Nm, 600 W and up to 400 per cent support. It sits alongside the men's-frame Sonic EVO AM SX siblings in the same Sonic carbon range.
Geometry · hover a row to highlight the measurement on the bike
| S | M | L | |
|---|---|---|---|
| Reach | 420 mm | 450 mm | 470 mm |
| Stack | 624 mm | 633 mm | 650 mm |
| Seattube | 400 mm | 440 mm | 470 mm |
| Chainstay | 450 mm | 450 mm | 450 mm |
| Headtube Angle | 65.5° | 65.5° | 65.5° |
| Seattube Angle (eff) | 75° | 75° | 75° |
| Wheelbase | 1184 mm | 1218 mm | 1246 mm |
| Headtube | 100 mm | 110 mm | 130 mm |
| Front Centre | 734 mm* | 768 mm* | 796 mm* |
| FC:RC | 1.63 | 1.71 | 1.77 |
Trims · 1
SX 1 | |
|---|---|
| Motor | Bosch Performance Line SX · 55 Nm |
| Battery | Bosch CompactTube 400 · 400 Wh |
| Travel F/R | 140/130 mm |
| Frame | Carbon |
| Fork | BULLS Lytro 34 SL LOR Air DS Boost, 140 mm |
| Shock | SR SUNTOUR Edge Plus 2CR, 130 mm |
| Headset | ACROS AIF-531 1.5" |
| Stem | Poligon 45mm |
| Handlebar | BULLS riserbar |
| Grips | prologo Proxim Enduro |
| Saddle | prologo Proxim 400 wide |
| Seatpost | LIMOTEC Alpha 1UH 31.6mm dropper + SL-MT500-IL, 150 mm |
| Brakes | SHIMANO BR-MT420 hydraulic disc |
| Rear derailleur | SHIMANO Deore RD-M6100 |
| Crank | BULLS 165 mm |
| Shifters | SHIMANO Deore SL-M6100, rapidfire+, I-spec-EV |
| Cassette | SHIMANO Deore CS-M6100 10-51T |
| Chain | SHIMANO CN-M6100-12 |
| Drivetrain | SHIMANO Deore RD-M6100; BULLS 165 mm; SHIMANO Deore SL-M6100, rapidfire+, I-spec-EV; SHIMANO Deore CS-M6100 10-51T; SHIMANO CN-M6100-12 |
| Wheels | MAVIC E-Crossride 1 CL MS |
| Tyres | SCHWALBE Wicked Will Performance (front) / Nobby Nic Performance (rear), 62-622 / 60-622 |
| Weight | 19.9 kg |
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