£25.00
Modolo Kronos right downtube shifter, hailing from Italy and in production during the 1980s (yet still new & unused after all this time!). Made from plastic and weighing in at 18 grams - incredibly lightweight for a downtube shifter at that time. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike too.
OVERVIEW
TECHNICAL INFO
Fixing Type - if you have small mounts on either side of the frame’s down tube you need braze-on shifters, if there are no mounts you’ll need clamp-on (sometimes referred to as band-on). Some 'aero' frames have mounts fixed to the top of the down tube, for these frames you require top mount shifters for the correct boss type (see below).
Shift Type - friction shifters don't click into gear when you change, when they do click it's referred to as indexed shifting. For this to work correctly you must use the same system as your rear derailleur, if you're using friction levers you can mix and match. You don't need to worry about the front derailleur as left downtube shifters aren't indexed.
Speed - the number of cogs at the back the right shifter is designed to be used with. This is important with indexed shifting but with friction shifters you can in theory run any shifters with any speed setup, although the right lever will need to be pulled back further to shift into the larger cogs.
Shifter Boss Type - the shape of the mount (for braze-on fixings only). Campagnolo / ISO is standard and easily identified by the flat sections on either side, usually combined with a square base for the backing stop plates to fit. There are also Shimano ones with a keyhole shaped base and much less common French ones that are round with no flat sections.
Boss Thread Size - M5 (5 mm) is standard for Campagnolo / ISO bosses, but Shimano bosses will often have M4.5 (4.5 mm) threads and the French bosses would likely have 5 x 1 mm threads.
SUBSCRIBE TO GET THE FIRST SCOOP
Exclusive content, new products, subscriber only promotions. Delivered to your inbox by tiny cyclists, every few weeks.
Don't worry, you can unsubscribe at any time.
PEDAL PEDLAR
T: 02036758003 // E: info@pedalpedlar.co.uk
© 2026 Pedal Pedlar.
Ecommerce Software by Shopify