{"product_id":"trek-district-4-coaster-belt-lowstep-bosch-smart-system-e-bike-with-gates-belt-drive","title":"Trek District+ 4 Coaster Belt Lowstep – Bosch Smart System E-Bike with Gates Belt Drive","description":"\u003cp\u003eThe \u003cstrong\u003eTrek District+ 4 Coaster Belt Lowstep\u003c\/strong\u003e is a premium urban e-bike built around the \u003cstrong\u003eBosch Smart System\u003c\/strong\u003e — Bosch's current-generation motor and battery platform that integrates the motor, battery, display, and app connectivity into a single unified system. The motor is the \u003cstrong\u003eBosch Active Line Plus\u003c\/strong\u003e, a compact, quiet mid-drive unit well-suited to urban riding and moderate gradients. The battery is \u003cstrong\u003esemi-integrated into the downtube\u003c\/strong\u003e and available in three capacities: \u003cstrong\u003e545Wh, 725Wh, and 800Wh\u003c\/strong\u003e — select the capacity that matches your typical daily range requirement. The \u003cstrong\u003elowstep frame\u003c\/strong\u003e provides a low standover height for easy mounting and dismounting, making it accessible for a wide range of riders regardless of flexibility or mobility.\u003c\/p\u003e\n\n\u003cp\u003eThe defining features of the Coaster Belt variant are the \u003cstrong\u003eGates CDX carbon belt drive\u003c\/strong\u003e and \u003cstrong\u003ecoaster-actuated hydraulic disc brakes\u003c\/strong\u003e. The Gates belt drive replaces the traditional chain with a carbon fibre reinforced belt that requires no lubrication, produces no grease, and lasts significantly longer than a chain in urban conditions — ideal for commuters who want a genuinely low-maintenance drivetrain. The coaster brake integrates the rear brake into the rear hub, activated by back-pedalling, eliminating the rear brake lever and cable from the cockpit for a clean, minimal setup. Hydraulic disc brakes provide reliable stopping power in all weather. Bosch Smart System connectivity allows ride data, navigation, and motor settings to be managed via the \u003cstrong\u003eeBike Flow app\u003c\/strong\u003e. For the mudguard-equipped version, see the \u003ca href=\"\/products\/trek-district-4-guard-lowstep-electric-hybrid-bike-for-urban-commuting-with-belt-drive-and-bosch-smart-system\"\u003eTrek District+ 4 Guard Lowstep\u003c\/a\u003e. For a higher-spec model with automatic Enviolo shifting, see the \u003ca href=\"\/products\/trek-district-5-lowstep-electric-hybrid-bike-with-bosch-performance-line-cruise-motor-and-automatic-enviolo-shifting\"\u003eTrek District+ 5 Lowstep\u003c\/a\u003e. Browse our full \u003ca href=\"\/collections\/e-bikes\"\u003ee-bike collection\u003c\/a\u003e and \u003ca href=\"\/collections\/hybrid-bikes\"\u003ehybrid bikes range\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It's Good For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUrban commuting and leisure riding — Bosch Active Line Plus mid-drive motor\u003c\/li\u003e\n\u003cli\u003eLow-maintenance drivetrain — Gates CDX carbon belt drive, no lubrication required\u003c\/li\u003e\n\u003cli\u003eEasy mounting and dismounting — lowstep frame with low standover height\u003c\/li\u003e\n\u003cli\u003eClean cockpit — coaster rear brake eliminates rear brake lever and cable\u003c\/li\u003e\n\u003cli\u003eReliable all-weather braking — hydraulic disc brakes\u003c\/li\u003e\n\u003cli\u003eBosch Smart System — eBike Flow app connectivity for ride data and motor settings\u003c\/li\u003e\n\u003cli\u003eThree battery options: 545Wh, 725Wh, and 800Wh\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It's NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOff-road or trail riding — urban geometry and tyres, not suited to rough terrain\u003c\/li\u003e\n\u003cli\u003eRiders who prefer a traditional chain drivetrain — belt drive requires a compatible frame and cannot be retrofitted\u003c\/li\u003e\n\u003cli\u003eHigh-cadence or performance-focused riding — the Active Line Plus motor is optimised for comfort and efficiency, not maximum power output\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhich battery size should I choose?\u003c\/strong\u003e\u003cbr\u003eThe 545Wh battery suits most urban commutes of up to 20–30 miles per charge in Eco or Tour mode. The 725Wh and 800Wh options extend range for longer commutes, hilly terrain, or riders who prefer to use higher assist levels. Bosch's range assistant tool (available via the eBike Flow app or Bosch website) can estimate range based on your route, weight, and assist preference.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is a coaster brake and how does it work?\u003c\/strong\u003e\u003cbr\u003eA coaster brake is a rear brake integrated into the rear hub, activated by back-pedalling rather than a hand lever. It's a traditional urban cycling feature that simplifies the cockpit by removing the rear brake lever and cable. The front hydraulic disc brake remains lever-operated. Coaster brakes work well for relaxed urban riding but are less suited to steep descents or situations requiring precise brake modulation — for those, the \u003ca href=\"\/products\/trek-district-4-guard-lowstep-electric-hybrid-bike-for-urban-commuting-with-belt-drive-and-bosch-smart-system\"\u003eDistrict+ 4 Guard Lowstep\u003c\/a\u003e with standard hydraulic disc brakes front and rear may be preferable.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes the Gates belt drive require any maintenance?\u003c\/strong\u003e\u003cbr\u003eThe Gates CDX belt drive requires minimal maintenance compared to a chain. It does not need lubrication, does not produce grease or oil, and is resistant to corrosion. Periodic inspection for wear and correct tension is recommended — Gates recommends checking tension every 500 miles or so. The belt will eventually wear and require replacement, but typically lasts significantly longer than a chain in urban conditions.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the Bosch Smart System and eBike Flow app?\u003c\/strong\u003e\u003cbr\u003eThe Bosch Smart System is Bosch's current e-bike platform, integrating the motor, battery, display, and connectivity into a unified system. The eBike Flow app (iOS and Android) connects to the bike via Bluetooth and allows you to adjust assist modes, view ride statistics, plan routes with range estimation, and update firmware. The system also supports Bosch's Kiox 300 and Purion 200 displays for on-bike information without using a phone.\u003c\/p\u003e","brand":"Trek","offers":[{"title":"XS \/ Trek Black Satin \/ 545wh","offer_id":45781519925423,"sku":"5330718","price":3367.2,"currency_code":"GBP","in_stock":true},{"title":"XS \/ Trek Black Satin \/ 800wh","offer_id":45781519958191,"sku":"5330719","price":3753.25,"currency_code":"GBP","in_stock":true},{"title":"S \/ Trek Black Satin \/ 545wh","offer_id":45781519990959,"sku":"5330721","price":3367.2,"currency_code":"GBP","in_stock":true},{"title":"S \/ Trek Black Satin \/ 800wh","offer_id":45781520023727,"sku":"5330722","price":3753.25,"currency_code":"GBP","in_stock":true},{"title":"M \/ Trek Black Satin \/ 545wh","offer_id":45781520056495,"sku":"5330724","price":3367.2,"currency_code":"GBP","in_stock":true},{"title":"M \/ Trek Black Satin \/ 800wh","offer_id":45781520089263,"sku":"5330725","price":3753.25,"currency_code":"GBP","in_stock":true},{"title":"L \/ Trek Black Satin \/ 545wh","offer_id":45781520122031,"sku":"5330727","price":3367.2,"currency_code":"GBP","in_stock":true},{"title":"L \/ Trek Black Satin \/ 800wh","offer_id":45781520154799,"sku":"5330728","price":3753.25,"currency_code":"GBP","in_stock":true},{"title":"XS \/ Trek Black Satin \/ 725wh","offer_id":45781520187567,"sku":"5331482","price":3825.0,"currency_code":"GBP","in_stock":false},{"title":"S \/ Trek Black Satin \/ 725wh","offer_id":45781520220335,"sku":"5331483","price":3825.0,"currency_code":"GBP","in_stock":false},{"title":"M \/ Trek Black Satin \/ 725wh","offer_id":45781520253103,"sku":"5331484","price":3825.0,"currency_code":"GBP","in_stock":false},{"title":"L \/ Trek Black Satin \/ 725wh","offer_id":45781520285871,"sku":"5331485","price":3825.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/DistrictPlus4Lowstep-25-47268-A-Primary.jpg?v=1768526014","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/trek-district-4-coaster-belt-lowstep-bosch-smart-system-e-bike-with-gates-belt-drive","provider":"Swinnerton Cycles","version":"1.0","type":"link"}