SunRace MF R30 Cassette

Answer of Christian

Hello. Please be informed : although Bikeinn names this item "Cassette", this item is in reality what is named "Freewheel". This is a reminder of what A Freewheel or Screw-on cluster, is -on your rear wheel´s hub, on the drive-side, the hub has a threaded protrusion -this "Freewheel" has thread that will engage onto the thread of the rear-wheel´s hub : so you screw the Freewheel onto the hub You question specifies "thickness of the package". Hmm, I assume you meant "thickness of the cluster of cogs" I put the cluster on a flat surface and measured it twice with a measuring tape ( not as accurate as a calliper, but you don´t need 1/10mm accuracy ) : - thickness : 35,8mm, count it slightly less than 36mm - I have a 26-inch bicycle with 135mm distance from left side to right side (the technical name is "dropout distance") , at the rear, where you engage the axle of the wheel to fasten it to the bike´s rear - this Screw-on cluster (or "Freewheel" ) fits perfectly onto my hub - the resulting layout allows the chain to pass freely ; enough space for chain to pass between the smallest cog of the cluster, and the bike´s frame My answer refers to a bike with a dropout-distance of 135mm. If you bike has another value of dropout, you can do an educated guess, based on the value of 36mm thickness. I hope this helps you out. Happy year 2024, happy bike rides.

Hello. Please be informed : although Bikeinn names this item "Cassette", this item is in reality what is named "Freewheel". This is a reminder of what A Freewheel or Screw-on cluster, is -on your rear wheel´s hub, on the drive-side, the hub has a threaded protrusion -this "Freewheel" has thread that will engage onto the thread of the rear-wheel´s hub : so you screw the Freewheel onto the hub You question specifies "thickness of the package". Hmm, I assume you meant "thickness of the cluster of cogs" I put the cluster on a flat surface and measured it twice with a measuring tape ( not as accurate as a calliper, but you don´t need 1/10mm accuracy ) : - thickness : 35,8mm, count it slightly less than 36mm - I have a 26-inch bicycle with 135mm distance from left side to right side (the technical name is "dropout distance") , at the rear, where you engage the axle of the wheel to fasten it to the bike´s rear - this Screw-on cluster (or "Freewheel" ) fits perfectly onto my hub - the resulting layout allows the chain to pass freely ; enough space for chain to pass between the smallest cog of the cluster, and the bike´s frame My answer refers to a bike with a dropout-distance of 135mm. If you bike has another value of dropout, you can do an educated guess, based on the value of 36mm thickness. I hope this helps you out. Happy year 2024, happy bike rides.

Answer of Guillem

It is compatible with steel frames from the 80s that have a distance between toenails of less than 130 mm. In my case I bought a Sunrace 7 crown freewheel sprocket to not have problems in my 80´s Orbea frame with 120mm dropout spacing and not have to force the chainstays and tie rods.

És compatible amb quadres d´acer dels anys 80 que tenen distancia entre punteres inferiors a 130 mm. En el meu cas vaig comprar un pinyó Sunrace de roda lliure de 7 corones per no tenir problemes en el meu quadre Orbea dels 80 i distància de 120 mm entre punteres i no haver de forçar les beines i tirants.

Answer of Trevor

Not sure the exact thickness of it but I can guarantee you that if you had another 6spd or 7spd freewheel it´ll fit straight on without a problem as I´ve done this many of times, no problems there. Sunrace are excellent quality.

Not sure the exact thickness of it but I can guarantee you that if you had another 6spd or 7spd freewheel it´ll fit straight on without a problem as I´ve done this many of times, no problems there. Sunrace are excellent quality.

Answer of Christian

Hello. If I understood : you're looking for a cluster of cogs, which starts at 16 teeth and ends at 25 teeth. First : this article here is a cluster of cogs which attaches to the rear-wheel-hub, by screwing it on the hub. -therefore, this article is NOT what is called a Cassette ; the article is a Screw-on Freewheel -please do not be misled by the title "Cassette" of the article in Bikeinn webpage : the title unfortunately creates a confusion between Cassette and Screw-on -in other words, you need to know : does your wheel-hub take a Screw-on Freewheel, or a Cassette ? Those designs are completely different, NOT interchangeable ***please read this page for diagrams and details https://www.sheldonbrown.com/k7.html Second : this (Screw-on Freewheel) Sunrace MF-R30 has these steps of teeth : 13-15-17-19-21-23-25 -therefore, this article has a cog which has 17 teeth instead of the 16 teeth that you're looking for, very very close ! Third : in the day-to-day life of a cyclist, what a cyclist looks for is : { 1/ the Small cog should go as low as possible, in order to provide as high a Top speed (on horizontal or down-hill roads ) as possible -therefore 13 teeth is a very good small cog ! [ Because of engineering reasons, engineers cannot make cogs smaller than 13 teeh on Screw-on Freewheels ] -therefore I can't understand your specifying that you look for a 16 teeth : what is the reason to start with 16 teeth ? 2/ the Large cog should allow you to climb the steepest slope of your habitual bike-trips ; -manufacturers make Screw-on Freewheels and Cassettes with the Large cog at 28 teeth, or 30, or 32, 34, and even 40 teeth on Cassettes for the latest bikes which only have a Single chainring (versus the usual Triple chainring) -this article Sunrace MF-R30 has a Large cog at 25 teeth : this means it can NOT help you overcome very steep slopes, but the advantage is that it is slightly lighter than another Screw-on Freewheel which has a Large cog at 28 teeth, or bigger } Conclusion : -I had a quick look on the internet for cluster of cogs starting with 16 teeth and ending with 25 t : found nothing ! On the range 13-15-17-19-21-23-25, simply do not use the 13 and 15 if you think they are useless ; and you still have all the other cogs for use -please talk this over with your Local Bike Shop -please make sure whether your rear-wheel-hub takes a Screw-on Freewheel, or a Cassette ? Remember Those designs are completely different, NOT interchangeable Happy bike rides !

Hello. If I understood : you're looking for a cluster of cogs, which starts at 16 teeth and ends at 25 teeth. First : this article here is a cluster of cogs which attaches to the rear-wheel-hub, by screwing it on the hub. -therefore, this article is NOT what is called a Cassette ; the article is a Screw-on Freewheel -please do not be misled by the title "Cassette" of the article in Bikeinn webpage : the title unfortunately creates a confusion between Cassette and Screw-on -in other words, you need to know : does your wheel-hub take a Screw-on Freewheel, or a Cassette ? Those designs are completely different, NOT interchangeable ***please read this page for diagrams and details https://www.sheldonbrown.com/k7.html Second : this (Screw-on Freewheel) Sunrace MF-R30 has these steps of teeth : 13-15-17-19-21-23-25 -therefore, this article has a cog which has 17 teeth instead of the 16 teeth that you're looking for, very very close ! Third : in the day-to-day life of a cyclist, what a cyclist looks for is : { 1/ the Small cog should go as low as possible, in order to provide as high a Top speed (on horizontal or down-hill roads ) as possible -therefore 13 teeth is a very good small cog ! [ Because of engineering reasons, engineers cannot make cogs smaller than 13 teeh on Screw-on Freewheels ] -therefore I can't understand your specifying that you look for a 16 teeth : what is the reason to start with 16 teeth ? 2/ the Large cog should allow you to climb the steepest slope of your habitual bike-trips ; -manufacturers make Screw-on Freewheels and Cassettes with the Large cog at 28 teeth, or 30, or 32, 34, and even 40 teeth on Cassettes for the latest bikes which only have a Single chainring (versus the usual Triple chainring) -this article Sunrace MF-R30 has a Large cog at 25 teeth : this means it can NOT help you overcome very steep slopes, but the advantage is that it is slightly lighter than another Screw-on Freewheel which has a Large cog at 28 teeth, or bigger } Conclusion : -I had a quick look on the internet for cluster of cogs starting with 16 teeth and ending with 25 t : found nothing ! On the range 13-15-17-19-21-23-25, simply do not use the 13 and 15 if you think they are useless ; and you still have all the other cogs for use -please talk this over with your Local Bike Shop -please make sure whether your rear-wheel-hub takes a Screw-on Freewheel, or a Cassette ? Remember Those designs are completely different, NOT interchangeable Happy bike rides !