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Technical & Reference Section => Tech and Restoration => Topic started by: Oldboyburner on April 17, 2014, 10:18 PM

Title: BCD on a chain ring
Post by: Oldboyburner on April 17, 2014, 10:18 PM

Can anyone tell me what it would be on a sugino 44 t
110?

Title: Re: BCD on a chain ring
Post by: stidds on April 17, 2014, 10:41 PM

I am pretty sure all Sugino is 110 BCD

Title: Re: BCD on a chain ring
Post by: Oldboyburner on April 17, 2014, 10:47 PM

Cheers mate

Title: Re: BCD on a chain ring
Post by: Dark Diggler on April 17, 2014, 10:48 PM

All of them except the 130 BCD ones :daumenhoch:

Title: Re: BCD on a chain ring
Post by: stidds on April 17, 2014, 11:06 PM

Just measure it to be sure, it is dead easy to find out the BCD...

(http://www.radbmx.co.uk/archive/albums/v518/stidds/BCD_zps1471335d.gif) (http://smg.photobucket.com/user/stidds/media/BCD_zps1471335d.gif.html)

Bolt Circle Diameter   Hole to Hole
Diameter                 Cntr to Cntr


5 Bolt Chainrings

56mm         32.9mm
58mm         34.3mm
94mm         55.4mm
74mm          43.5mm
110mm         64.7mm
130mm         76.4mm
135mm          79.5mm
144mm          84.6mm

4 Bolt Chainrings

58mm          41.0mm
64mm          45.3mm
68mm          48.1mm
104mm          73.6mm
112mm          79.2mm

Title: Re: BCD on a chain ring
Post by: bobbbbsy on April 18, 2014, 12:20 AM

pretty good that sean - or

 sheldon says - Measuring BCD: This 110 mm BCD ring measures 64.7 mm center-to-center.

Multiplying this dimension by 1.7 will give you the actual BCD for a 5 bolt chainring.

Use 1.4 for 4 bolt chainrings

Title: Re: BCD on a chain ring
Post by: That Swan Guy on April 18, 2014, 08:19 AM

Aren't Sugino rings both?

Title: Re: BCD on a chain ring
Post by: Jaan on April 18, 2014, 08:24 AM

No, typically they're 110

Title: Re: BCD on a chain ring
Post by: snoopy72 on April 18, 2014, 08:45 AM

Takagi 130bcd
Sugino 110bcd
Pro / tuf neck  110/130
Takagi MX 120bcd
PPP  110/130bcd
Shimano 130bcd