[Bowaleed]

Hi,
Who know what’s is the lightest 520 front sporcket in the market (vortex,superlight,driven..etc) i hope i have an accurate answer from someone scaled them.

 

[BillV]

See this.

 

[Bowaleed]

See this.

Thank you for your help, that was useful but I’m afraid it’s old post (7 years ago) and not updated for the new products in the market

 

[Mb1500]

Ask the manufacturers yourself and give us fresh information then.

 

[SparkyMJ]

I mean, when you're talking about weight of a rotating part, the scale weight isn't really going to help you find the highest performing unit, despite the quality. What I'd guess you're after is the lowest rotational inertia sprocket. Two identical scale weight sprockets can have totally different rotational inertia values.

Unless you're literally racing for times, you probably won't notice a difference in performance between any of the 'lightweight' specified sprockets out there. You will definitely notice differences in quality though, especially at 520 size. I remember when people were splitting Superlite sprockets, but I think that was mostly rear ones....

Hope this helps. Sorry I don't have any weights/specs on sprockets tho.

-Mike

 

[mte78]

Thanks, Bill. I have a Renthal 520 on my current build too. I am a big fan of Renthal quality, plus they have the nicest looking sprockets IMO.

 

[BillV]

The Driven front sprocket in my link was the 1007-520-17T and the Renthal was the 321U-520-17P. The Renthal site seems to have everything unavailable due to COVID issues. But I see them on ebay.

I had weight information indicating that the lightest aluminum 520 rear sprocket that didn't crack when used was the AFAM Workslite. They're hard to find in the US. I ended up getting one from Germany only to find that my current Driven rear was significantly lighter (mutter!). The Renthal rear is indeed good looking and popular here. But I don't have a weight.

 

[TwistedMister]

prolly going to be a titanium sprocket, weight relieved (drilled like brake rotors)

 

[BillV]

As I understand it (no guarantee) the MotoGP people use titanium rear sprockets made by VAZ but steel fronts. So there must be some sort of strength or wear issue. VAZ is in Brazil and has an expertise in fineblanking, which may be what this is about. Fairly recently Superlite has offered a US made 45 tooth titanium rear for the R1 in race use. At first glance it looks like a copy of the VAZ. The 12 oz/ 340 gm weight is nothing special.

 

[TwistedMister]

welp titanium is stronger than steel so its more of an availability or why issue for their bikes, if it's strong enough for the rear its strong enough for the front and they don't care about wear, they would replace it next session..

best guess is there really isn't enough difference in weight or strength to negate the cost and they're making some slick steel alloy these days, Vortex makes a nice one all lightened up ...who knows ask em they have youtube channels and answer questions, go ask Mir he ain't doin much these days but healing up I am sure he would be more than glad to answer some questions about his old bike..