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The Trek Charter+ 4 R9 800 Wh Lowstep takes the step-through Alpha Platinum aluminium frame of the Charter+ 4 and fits it with the large 800 Wh Bosch PowerTube battery. A 75 Nm Bosch Performance Line motor, 9-speed Shimano CUES and integrated equipment, for 31.70 kg in size M according to Trek. Lunar Silver dresses it in a light, modern silver grey.
| Frame | Alpha Platinum aluminium, Lowstep step-through frame, Bosch battery inserted through the top of the down tube, cables integrated through the cockpit, integrated rack and mudguards, bolt-on adjustable rear dropout |
| Motor | Bosch Performance Line, 250 W, 75 Nm |
| Battery | Bosch PowerTube 800 Wh, Bosch smart system |
| Controls / display | Bosch Purion 200 |
| Drivetrain | Shimano CUES 9-speed Linkglide: LG300 11-46 cassette, LG500 chain, ProWheel alloy 170 mm chainset |
| Fork | SR Suntour SF25-NVX32, coil spring, adjustable preload, 63 mm travel |
| Brakes | Shimano MT200 hydraulic disc, 180 mm rotors |
| Wheels / tyres | Bontrager Kovee double-wall Tubeless Ready 23 mm rims / Bontrager E6 Hard-Case Lite 27.5 x 2.40 in tyres with reflective sidewalls |
| Cockpit | Alloy 630 mm handlebar, 25 mm rise, Bontrager alloy 80 mm height-adjustable stem, Blendr compatible, Trek Ergonomic Comp grips |
| Saddle / seatpost | Bontrager Boulevard / alloy suspension seatpost 31.6 mm, 300 mm |
| Equipment | Trek Charter aluminium mudguards, rack integrated into the frame, Pletscher Comp Flex 40 kickstand, Bontrager City pedals |
| Weight | 31.70 kg in size M (Trek figure) |
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At a glance
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For the leisure rider who loves long day rides, a picnic in the panniers and the ride home without watching the battery gauge. It also suits active retirees who ride several times a week without wanting to recharge after every outing.
The maximum energy reserve of the derailleur-equipped Charter+ 4. Here Trek slips an 800 Wh Bosch PowerTube into the Alpha Platinum aluminium down tube, without changing the silhouette of the step-through frame. The battery's mass stays low and central, between the two wheels, which steadies the bike when stationary and in slow corners. The rack and mudguards are part of the frame itself.
| Shimano CUES derailleur | Nexus 5 hub + belt | Enviolo hub + belt | |
| How it works | 9 sprockets and a Linkglide chain | 5 gears enclosed in the hub | Continuously variable, no steps |
| Maintenance | Chain needs cleaning and lubing | Grease-free belt, sealed hub | Grease-free belt, sealed hub |
| Reference bike | Charter+ 4 R9, 30.80 kg (M, 540 Wh) | Charter+ 4 Nexus 5, 30.60 kg (M, 540 Wh) | Charter+ 4 Enviolo, 31.60 kg (M, 540 Wh) |
| What it means | Widest gear range | Shifts at a standstill, clean | The ideal gear at any moment |
In short: compared with the 540 Wh version, you gain 260 Wh of capacity for 0.90 kg more according to Trek (31.70 kg versus 30.80 kg in M). The rest of the bike is identical: same motor, same drivetrain, same equipment.
The Canal du Midi towpath, heading west from the Fonseranes locks, is flat but sometimes rough: the 63 mm coil fork, the suspension seatpost and the 2.40-inch tyres keep you comfortable after hours in the saddle. The assistance, limited to 25 km/h, is especially helpful for getting going again into a headwind.
The 800 Wh battery with the Bosch smart system slides in through the top of the down tube. It adds 0.90 kg compared with the 540 Wh, weight carried low that you barely notice when riding. To make it last, store it somewhere dry at a moderate temperature between rides.
| Model | Motor / battery | Drivetrain | Fork | Weight (size) |
| Charter+ 4 R9 540 Wh Lowstep | Bosch Performance Line 75 Nm / 540 Wh | Shimano CUES 9-speed | 63 mm coil | 30.80 kg (M) |
| Charter+ 4 R9 800 Wh Lowstep | Bosch Performance Line 75 Nm / 800 Wh | Shimano CUES 9-speed | 63 mm coil | 31.70 kg (M) |
| Charter+ 5 R10 800 Wh Lowstep | Bosch Performance Line PX 90 Nm / 800 Wh | Shimano CUES 10-speed | Mobie 34 air 80 mm | 31.20 kg (M) |
| Charter+ 4 Nexus 5 belt 800 Wh Lowstep | Bosch Performance Line 75 Nm / 800 Wh | Nexus 5 + belt | 63 mm coil | 31.50 kg (M) |
Our take: 31.70 kg in M for 800 Wh, versus 30.80 kg for the 540 Wh version: the extra weight is small given the capacity gained. If you want more torque, the Charter+ 5 R10 800 Wh goes up to 90 Nm and weighs 31.20 kg.
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LVR sizing advice You get onto the Lowstep frame from the front, without lifting your leg: the size is chosen mainly on saddle height and reach. Trek's ranges overlap between M and L (170 to 173 cm); in that case, the smaller size gives a more upright position and the larger one more room for long rides. The height-adjustable stem then fine-tunes the position.
Source: Trek size guide. Bike fitting available in our Béziers shop. |
| How long does a full charge take? | It depends on the Bosch charger used; we'll give you the charging times when you collect the bike. |
| Can the big battery be removed? | Yes, it comes out through the top of the down tube so you can charge it at home. |
| Can I ride on the canal towpath? | Yes, the 2.40-inch tyres and coil fork are very well suited to it. |
| Is the grey metallic? | Lunar Silver is a light silver grey with a bright finish. |
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The LVR Cycles verdict The derailleur-equipped Charter+ 4 for long days out, with the most generous battery and consistent comfort on flat tracks. Its light silver grey gives it a fresh, modern look.
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Why buy from LVR Cycles? In Béziers, we suggest routes along the canal and the greenways, set up your position for long rides and handle the Bosch updates.
Please note that the specifications may be changed without prior notice by the manufacturer, based on the availability of components and other factors.
Data sheet
Specific References
Electric trekking bike Trek Charter+ 4 R9 800 Wh Lowstep grey: Bosch 800 Wh, CUES 9-speed, 31.70 kg in M
