{"id":50403,"date":"2026-05-08T14:31:08","date_gmt":"2026-05-08T18:31:08","guid":{"rendered":"https:\/\/overcentral.com\/en\/bosch-performance-line-px-powers-norco-sight-vlt-e-mtb-with-90-nm-torque\/"},"modified":"2026-05-08T14:32:08","modified_gmt":"2026-05-08T18:32:08","slug":"bosch-performance-line-px-norco-sight-vlt-emtb","status":"publish","type":"post","link":"https:\/\/overcentral.com\/en\/bosch-performance-line-px-norco-sight-vlt-emtb\/","title":{"rendered":"Bosch Performance Line PX Powers Norco Sight VLT e-MTB with 90 Nm Torque"},"content":{"rendered":"

The Bosch<\/a> Performance Line PX is a versatile mid-drive motor finding its way into diverse electric bicycle categories, including the notable application in the Norco Sight VLT<\/a> e-MTB where it delivers 90 Nm of torque. Understanding the technical distinctions between Bosch’s motor families is crucial for riders to align expectations with performance. The Performance Line PX was engineered with a broader range of e-bikes in mind, prioritizing compatibility with systems like coaster brakes commonly found on city models. This design philosophy results in a simpler internal architecture compared to the more specialized Performance Line CX. A key differentiator is the single freewheel mechanism in the PX, which contrasts with the dual freewheels in the CX motor. This simplification inherently limits certain advanced functionalities but contributes to a more cost-effective manufacturing process, a saving that can potentially be passed on to the consumer in the form of a more affordable e-bike.<\/p>\n

Performance Comparison: PX vs. CX<\/h2>\n

While the Bosch Performance Line PX offers compelling performance, it sits in a distinct tier below the flagship CX model. In terms of raw power output, they are closely matched; the PX delivers a peak of 700 watts versus the CX’s 750 watts, with both motors providing an identical 250 watts of continuous power. The most significant divergence emerges in torque, especially following Bosch’s Power Upgrade 2.0. This update boosted the Performance Line CX to a substantial 120 Nm<\/a>, while the Performance Line PX retains its original 90 Nm rating. However, the PX did benefit from the update in another area. Through the Bosch eBike Flow app<\/a>, riders can now increase the motor assistance in Auto and Turbo modes from 400% to a maximum of 600%, though this enhanced multiplier is capped at speeds up to 15 km\/h.<\/p>\n

Functional Limitations and E-MTB Suitability<\/h2>\n

The technical simplifications of the PX motor have direct implications for its use on an electric mountain bike like the Norco Sight VLT. The absence of a second freewheel means it cannot support Bosch’s Rollshift feature, part of the eShift function that allows for gear changes while coasting. Another notable omission for trail riding is the Extended Boost feature. This function, which can be finely tuned in the eBike Flow app, provides continued motor assistance after a pedal stroke to help overcome obstacles and is unavailable on PX-equipped models. Consequently, while the 90 Nm motor<\/a> offers ample power for many situations, it may lack the instantaneous punch and specific trail-enhancing features of its more powerful sibling. Some test reports have also indicated a potential for rattling noises on very rough terrain, a phenomenon less likely to be encountered on paved paths but more relevant in a mountain biking context.<\/p>\n","protected":false},"excerpt":{"rendered":"

The Bosch Performance Line PX is a versatile mid-drive motor finding its way into diverse electric bicycle categories, including the notable application in the Norco Sight VLT e-MTB where it delivers 90 Nm of torque. Understanding the technical distinctions between Bosch’s motor families is crucial for riders to align expectations with performance. The Performance Line […]<\/p>\n","protected":false},"author":6,"featured_media":90935,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/cards.overcentral.com\/cards\/en\/50403.png","fifu_image_alt":"Bosch Performance Line PX Powers Norco Sight VLT e-MTB with 90 Nm","footnotes":""},"categories":[31],"tags":[],"class_list":["post-50403","post","type-post","status-publish","format-standard","has-post-thumbnail","category-technology"],"fifu_image_url":"https:\/\/cards.overcentral.com\/cards\/en\/50403.png","fifu_image_alt":"Bosch Performance Line PX Powers Norco Sight VLT e-MTB with 90 Nm","_links":{"self":[{"href":"https:\/\/overcentral.com\/en\/wp-json\/wp\/v2\/posts\/50403","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/overcentral.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/overcentral.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/overcentral.com\/en\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/overcentral.com\/en\/wp-json\/wp\/v2\/comments?post=50403"}],"version-history":[{"count":0,"href":"https:\/\/overcentral.com\/en\/wp-json\/wp\/v2\/posts\/50403\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/overcentral.com\/en\/wp-json\/wp\/v2\/media\/90935"}],"wp:attachment":[{"href":"https:\/\/overcentral.com\/en\/wp-json\/wp\/v2\/media?parent=50403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/overcentral.com\/en\/wp-json\/wp\/v2\/categories?post=50403"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/overcentral.com\/en\/wp-json\/wp\/v2\/tags?post=50403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}