VeloBase.com - Component: Shimano L-284 / SL-101 , Dura-Ace First Gen.

Shimano L-284 / SL-101 , Dura-Ace First Gen.

System Message: The most recent update appears to have broken images, unfortunately it looks like another code deploy will be needed to fix it. I hope to have that done by late Tuesday evening US Central Time. Posted: 08/19/25 06:24 AM CST

Photo Credit: eBay Seller zairebunia

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Category:	Shifters
Name:	Shimano L-284 / SL-101 , Dura-Ace First Gen.
Brand:	Shimano
Primary Group:	Dura-Ace
Model:	L-284 / SL-101
Years:	1973 - ?
Country:	Japan
Weight:	77.5 grams (avg) View Weight List
Added By:	JFischer on 07/19/07
Updated By:	JFischer on 09/09/10
Additional Photos - click for full size

Shifter Type	Downtube	Attachment Style	Clamp-On; Downtube Braze-on (standard)
Shifting Systems	Friction	Lever Markings	Shimano
Lever Material	Aluminum

General Information

Quality:	Very Good, 4.17/5 (3 votes)	Rarity:	Rare, 4.33/5 (3 votes)
	0 1 2 3 4 5 6 7 8 9 10		0 1 2 3 4 5 6 7 8 9 10

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Additional Resources
Resources:	Reference & Charts Catalogs

Component Variations	View Detailed List Manage Variations
Variations of Component exist (Component is 1 of 2)	Brand	Group
Shimano Dura-Ace First Gen. (Black)	Shimano	Dura-Ace

Component Groups
Primary Group Name	Brand	Quick Info	Browse Group Components
Dura-Ace, First Generation	Shimano	1973 - 1976, Road Race	View 35 Components
Details: The introduction of Dura-Ace in the mid 1970's, along with the indroduction of the Shimano 600 group were Shimano's first attempts at a professional quality road racing component group. The first Generation Dura-Ace was updated and renamed the 7100 series by around 1977/78.

Brand Information(click to expand)

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Weight	Source	Notes	Added By
80 Grams	Unknown		JFischer
75 Grams	Spec	L-284 spec.	JFischer