--- title: MBL (USA) | V-ribbed Belts description: Designed to reduce noise and ensure reliability, V-ribbed belts are perfect for high-speed rotation and compact designs. --- [Skip to content](https://www.mblusa.com/v-ribbed_belts#main-content) - - [mailto:mblusa.sales@mitsuboshi.com](mailto:mblusa.sales@mitsuboshi.com) - - [E-COMMERCE](https://ecommerce.mblusa.com/my-account/login/)        [AUTO BELT SEARCH](https://www.showmetheparts.com/mbl/) [![Mitsuboshi Logo](https://www.mblusa.com/hs-fs/hubfs/Mitsuboshi%20Long%20Logo%20Blue%20Web-1.png?width=325&height=37&name=Mitsuboshi%20Long%20Logo%20Blue%20Web-1.png "Mitsuboshi Logo")](https://www.mblusa.com?hsLang=en) - [About Us](https://www.mblusa.com/mitsuboshi_belting_ltd#about_us) Show submenu for About Us - [Our Company](https://www.mblusa.com/mitsuboshi_belting_ltd) - [Our History](https://www.mblusa.com/history) - [Join Us](https://www.mblusa.com/careers) - [News & Insights](https://www.mblusa.com/mbl-usa-corporation-news) - [Products](https://www.mblusa.com/products) Show submenu for Products - [By Categories](https://www.mblusa.com/products#by_catagories) - [By Transmission Type](https://www.mblusa.com/products#by_transmission_type) - [By Application](https://www.mblusa.com/products#by_application) - [Industries](https://www.mblusa.com/products#by_application) Show submenu for Industries - [Agriculture](https://www.mblusa.com/agriculture) - [Automotive](https://www.mblusa.com/automotive) - [Heavy Duty](https://www.mblusa.com/heavy_duty) - [Industrial](https://www.mblusa.com/industrial) - [Lawn & Garden](https://www.mblusa.com/lawnandgarden) - [Recreational](https://www.mblusa.com/powersports) - [Resources](https://www.mblusa.com/resources) - [Careers](https://www.mblusa.com/careers) - [Contact Us](https://www.mblusa.com/service/contact/#contact_us) Show submenu for Contact Us - [North & South America](https://www.mblusa.com/service/contact/) - [Japan](https://www.mitsuboshi.com/english/inquiry/form_general/) - [Europe](https://www.mitsuboshi.de/en/contact/) - [About Us](https://www.mblusa.com/mitsuboshi_belting_ltd#about_us) Show submenu for About Us - [Our Company](https://www.mblusa.com/mitsuboshi_belting_ltd) - [Our History](https://www.mblusa.com/history) - [Join Us](https://www.mblusa.com/careers) - [News & Insights](https://www.mblusa.com/mbl-usa-corporation-news) - [Products](https://www.mblusa.com/products) Show submenu for Products - [By Categories](https://www.mblusa.com/products#by_catagories) - [By Transmission Type](https://www.mblusa.com/products#by_transmission_type) - [By Application](https://www.mblusa.com/products#by_application) - [Industries](https://www.mblusa.com/products#by_application) Show submenu for Industries - [Agriculture](https://www.mblusa.com/agriculture) - [Automotive](https://www.mblusa.com/automotive) - [Heavy Duty](https://www.mblusa.com/heavy_duty) - [Industrial](https://www.mblusa.com/industrial) - [Lawn & Garden](https://www.mblusa.com/lawnandgarden) - [Recreational](https://www.mblusa.com/powersports) - [Resources](https://www.mblusa.com/resources) - [Careers](https://www.mblusa.com/careers) - [Contact Us](https://www.mblusa.com/service/contact/#contact_us) Show submenu for Contact Us - [North & South America](https://www.mblusa.com/service/contact/) - [Japan](https://www.mitsuboshi.com/english/inquiry/form_general/) - [Europe](https://www.mitsuboshi.de/en/contact/) This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. [know more](https://www.hubspot.com/) - [Products](https://www.mblusa.com/products?hsLang=en) > - [Automotive Belts](https://www.mblusa.com/automotive?hsLang=en) > - V-ribbed Belts # V-ribbed Belts V-ribbed belts combine the benefits of flat belt flexibility with the power transmission capability of the V-belt. V-ribbed belts provide the ultimate in belt design for use on today's modern engines where space and weight are critical. Rubber compounds are formulated to reduce noise caused by humid conditions and worn pulleys. Proven reliability on drives with or without automatic tensioners. ![Mitsuboshi RIBSTAR Accessory Drive V-ribbed Belt](https://www.mblusa.com/hubfs/image_OEM_RS_v-ribbed-beltweb-1.jpg "Mitsuboshi RIBSTAR Accessory Drive V-ribbed Belt") #### RIBSTAR™ **Accessory Drive V-ribbed Belt** RIBSTAR V-ribbed belts have the advantage of both V-belts and Flat belts, this is ideal for high speed rotation with a small pulley. In addition, low elastic tensile cord, special rubber and the unique structure of the V-shape rib all contribute to high power transmission. ![Mitsuboshi Double-sided V-ribbed Belt](https://www.mblusa.com/hubfs/Dual%20Star%20V-Ribbed-1.jpg "Mitsuboshi Double-sided V-ribbed Belt") #### Double-sided **V-ribbed on both sides** Double sided V-ribbed belts provide the ultimate in belt design for use on today's modern engines where space and weight are critical. Accessories can be driven from the top or bottom side of the belt enabling compact designs. Top or backside ribs are capable of handling high-load accessories. ![Mitsuboshi Star Fit Low Modulus V-ribbed Belt](https://www.mblusa.com/hubfs/Star%20Fit%205PK674web.png "Mitsuboshi Star Fit Low Modulus V-ribbed Belt") #### Star Fit® **Low Modulus V-ribbed Belt** Standard v-ribbed belts require a tension pulley, but Star Fit® V-ribbed belts use tensile cords with a low modulus of elasticity, eliminating the need for a tension pulley. Since the tension pulley is no longer needed, the system can be lightweight and space-saving.  [Learn More](https://www.mblusa.com/star_fit?hsLang=en) ### Construction **Top Fabric** Flexible, bias-cut fabric is impregnated with oil and heat-resistant rubber to eliminate wear and cracking. **Adhesion Rubber** Cords are enclosed in an oil and heat-resistant rubber compound with strong adhesive qualities for maximum cord support and long life. **Tensile Cords** High tensile strength aramid or pre-stretched polyester cords ensure high horsepower capacity and constant belt tension on spring tension systems and locked center drives.  **Rib Rubber** Rib rubber is reinforced with fiber chips and heat-resistant rubber compound for wear resistance and reduced noise. RIBSTAR™ Star Fit® ![image_OEM_RS_v-ribbed-belt_material_en](https://www.mblusa.com/hs-fs/hubfs/image_OEM_RS_v-ribbed-belt_material_en.png?width=900&height=374&name=image_OEM_RS_v-ribbed-belt_material_en.png)     ![image_OEM_RS_low-modulus-belt_material_en (1)](https://www.mblusa.com/hs-fs/hubfs/image_OEM_RS_low-modulus-belt_material_en%20(1).png?width=900&height=365&name=image_OEM_RS_low-modulus-belt_material_en%20(1).png)     ![Product-Applications-V-Ribbed-Belt](https://www.mblusa.com/hs-fs/hubfs/Product-Applications-V-Ribbed-Belt.jpg?width=663&height=498&name=Product-Applications-V-Ribbed-Belt.jpg "Product-Applications-V-Ribbed-Belt") V-ribbed belt application. ### Symptoms for Replacement When you find any of the symptoms shown below, replace the belt. It is recommended that you replace the idling pulley and/or tensioning pulleys at the same time. ![PhotoSymptoms-and-Replacement-Rib-Cracks](https://cdn2.hubspot.net/hub/39607677/hubfs/PhotoSymptoms-and-Replacement-Rib-Cracks.jpg?width=1200&length=1200&name=PhotoSymptoms-and-Replacement-Rib-Cracks.jpg) Rib Cracks ![PhotoSymptoms-and-Replacement-Rib-torn-off](https://cdn2.hubspot.net/hub/39607677/hubfs/PhotoSymptoms-and-Replacement-Rib-torn-off.jpg?width=1200&length=1200&name=PhotoSymptoms-and-Replacement-Rib-torn-off.jpg) Rib torn off ![PhotoSymptoms-and-Replacement-Cord-delamination](https://cdn2.hubspot.net/hub/39607677/hubfs/PhotoSymptoms-and-Replacement-Cord-delamination.jpg?width=1200&length=1200&name=PhotoSymptoms-and-Replacement-Cord-delamination.jpg) Cord delamination ![PhotoSymptoms-and-Replacement-Rib-bottom-cracks](https://cdn2.hubspot.net/hub/39607677/hubfs/PhotoSymptoms-and-Replacement-Rib-bottom-cracks.jpg?width=1200&length=1200&name=PhotoSymptoms-and-Replacement-Rib-bottom-cracks.jpg) Rib bottom cracks ![photoSymptoms-and-Replacement-Cord-popped-out](https://cdn2.hubspot.net/hub/39607677/hubfs/photoSymptoms-and-Replacement-Cord-popped-out.jpg?width=1200&length=1200&name=photoSymptoms-and-Replacement-Cord-popped-out.jpg) Cord popped out ### Sizes ![Ribstar_profile](https://www.mblusa.com/hs-fs/hubfs/Ribstar_profile.png?width=400&height=222&name=Ribstar_profile.png "Ribstar_profile") ![Ribstar_sizes](https://www.mblusa.com/hubfs/Ribstar_sizes.png "Ribstar_sizes") #### Questions? Please contact us to request more information about our product and how it can work with your application. [CONTACT US](mailto:mblusa.sales@mitsuboshi.com) #### Brochure Explore the features and options our line-up of automotive belts has to offer to meet your needs. [Download Now](https://www.mblusa.com/hubfs/Brochures%20and%20Catalogs%20(pdfs,%20covers)/PDFs/Mitsuboshi_Automotive_Belts_Brochure_M543-C.pdf?hsLang=en) [![image_OEM_TG_cam-drive-timing-belt](https://39607677.fs1.hubspotusercontent-na1.net/hub/39607677/hubfs/image_OEM_TG_cam-drive-timing-belt.png?width=1200&length=1200&name=image_OEM_TG_cam-drive-timing-belt.png)](https://www.mblusa.com/ohc_timing_belt?hsLang=en) OHC Timing Belt [![image_OEM_RE1](https://39607677.fs1.hubspotusercontent-na1.net/hub/39607677/hubfs/image_OEM_RE1.png?width=1200&length=1200&name=image_OEM_RE1.png)](https://www.mblusa.com/raw_edge_v-belts?hsLang=en) Raw Edge V-belts --- [![6△ロゴ(青地白文字)](https://www.mblusa.com/hs-fs/hubfs/6%E2%96%B3%E3%83%AD%E3%82%B4(%E9%9D%92%E5%9C%B0%E7%99%BD%E6%96%87%E5%AD%97).png?width=109&height=113&name=6%E2%96%B3%E3%83%AD%E3%82%B4(%E9%9D%92%E5%9C%B0%E7%99%BD%E6%96%87%E5%AD%97).png "6△ロゴ(青地白文字)")](https://www.mblusa.com?hsLang=en) MBL (USA) Corporation manufactures and distributes power transmission belts for original equipment and service parts in the automotive, recreational, and industrial markets. [![Japanese button english-1](https://www.mblusa.com/hs-fs/hubfs/Japanese%20button%20english-1.png?width=411&height=75&name=Japanese%20button%20english-1.png "Japanese button english-1")](https://www.mitsuboshi.com/english/) [![global_portal_en-1](https://www.mblusa.com/hs-fs/hubfs/global_portal_en-1.png?width=231&height=71&name=global_portal_en-1.png "global_portal_en-1")](https://global.mitsuboshi.com/?_fsi=BTkyi7wZ) ## Get In Touch (815) 434-1282 Toll Free (877) 625-7832 [mblusa.websupport@mitsuboshi.com](mailto:mblusa.websupport@mitsuboshi.com) Plant & Warehouse: 601 Dayton Road, Ottawa, IL 61350 Sales & Engineering: 1600 Golf Road, Rolling Meadows, IL 60008 ## Menu - [About Us](https://www.mblusa.com) - [Products](https://www.mblusa.com/products) - [Resources](https://www.mblusa.com/resources) - [Careers](https://www.mblusa.com/careers) - [News](https://www.mblusa.com/mbl-usa-corporation-news) Copyright © 2025 MBL (USA) Corporation All Rights Reserved. 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