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Closeup look at Rotor’s one-piece 46/30 Spidering double chainring, plus pricing

Written by Tyler Benedict
25 Comments
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rotor spidering one-piece 46-30 double chainring for gravel and cyclocross road bikes

Mentioned at Eurobike but not available for photos, the one-piece fully machined Rotor Spidering now has pricing and a ship date. The design combines 46 and 30 tooth chainrings into a single part, bringing weight down to just 144g (claimed). While the low weight and easy direct mount design are two of the highlights, the real bonus is being able to run such a small inner chainring for wide range compact gearing on your gravel or cyclocross bike…

rotor spidering one-piece 46-30 double chainring for gravel and cyclocross road bikes

The Rotor Spidering is CNC’d from 7075 T6 alloy, then pinned to assist the chain moving up to the large ring. In addition to lower gearing, it should also fit more bikes thanks to the lower profile. As gravel bikes open up the chainstays to fit larger tires, many have switched to single chainring setups to maintain proper clearance, so this could be an option for those who still prefer a double.

rotor spidering one-piece 46-30 double chainring for gravel and cyclocross road bikes

rotor spidering one-piece 46-30 double chainring for gravel and cyclocross road bikes

The direct mount design will fit standard and InPower versions of Rotor’s 3D+, 3D and Flow cranksets with a 43.5mm chainline. It’s compatible with both 10- and 11-speed chains and drivetrains. It uses a round “NoQ” chainring profile, not oval. Look for it to start shipping around Christmas time and retail for a very reasonable $164.99 (€149,99).

RotorBike.com
Tyler Benedict
11,281 articles

Tyler Benedict is the Founder of Bikerumor.com, where he’s been writing about the latest bikes, components, and cycling technology for almost two decades. Prior to that, Tyler launched and built multiple sports nutrition brands and consumer goods companies, mostly as an excuse to travel and ride in new places.

Based in North Carolina, Tyler also loves the Vanlife & family adventure travel and is always on the lookout for the next shiny new part and off-grid adventure.

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Walter
Walter
8 years ago

If it’s possible to slap a large chainring on the outside, you’d have quite a cool triple.

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Champs
Champs
8 years ago
Reply to  Walter

With 11s cassettes, even the pros run 11-28s. At the top end, 46t gives you a bigger gear than 53×13, yet the bottom is lower than a 39×23. Shifting that on my triple? Ugh.

It is conceded that a 16t jump in ring size is harsh. On the other hand, how much will you really need to?

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Walter
Walter
8 years ago
Reply to  Champs

Depends on what you want to ride. On my trekking bike I have a 55/39/30 triple with 11-30 cassette. I need both 30/30 and 55/11. Also, close ratio is a good thing. So larger cogs and, say, a 60, could make it a nice combination for a traveller.

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patrick
patrick
8 years ago
Reply to  Walter

I’m with you on the 1:1, but who NEEDS a 55×11?? Do you find yourself pedaling your trekking bike at 40+ mph very often?

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Walter
Walter
8 years ago
Reply to  patrick

If you ride in Scandinavia, especially Sweden, you have long slow descents. And you have the Scandinavian climate. If you don’t move your legs on such a descent, they get very cold. If you can keep pedalling at low power, your legs stay warm and it is a lot easier to take the next hill. I can keep up until some 55-60 km/h, which is enough for most Scandinavian descents.
Disclaimer: my trekking bike is a recumbent high racer, so it is bloody fast. Still, even on a traditional trekking bike, long cold descents are a reason to have a fairly high top gear.

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LOL
LOL
7 years ago
Reply to  Walter

A 40+ mile an hour descent is a slow descent????? Sorry, but no amateur rider needs a 55/11 unless they literally have the slowest cadence in history. 🙂

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Tom
Tom
8 years ago

can’t tell by looking, does this pattern fit on a Cannonade crank?

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Aaron
Aaron
8 years ago
Reply to  Tom

These rings “will fit to Rotor’s 3D+, 3D & Flow cranks, as well as their INpower analogues. “

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drosser
drosser
8 years ago

I for one WELCOME our new, sub-compact overlords!

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Bigschill
Bigschill
8 years ago

finally someone gets the right chainring sizes!! Some of us still run old 94BCD cranksets with 46-20 rings

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Aaron
Aaron
8 years ago

Gravel double gearing has been a long time coming….

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Morten Knudsen
Morten Knudsen
8 years ago
Reply to  Aaron

love my 50/34 11/36 – but i would prefer a super compact and a tighter casette.

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dustytires
dustytires
8 years ago

AWESOME move in gear sizes, but …… where’s the Q Rotor?!!!! I love Q Rings, and as soon as this is available in oval it will be mine.

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epicthroatbeard
epicthroatbeard
8 years ago

i like that big toothy bash guard and 30 is a good drive ring. nice product.

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STS
STS
8 years ago

It’s intended for gravel bikes but still keeps the chain rings on the obsolete 43.5 mm chain line??? This should at least be 46.0 mm when combined with the 135 / 142 mm OLD of disc brake rear ends / hubs.

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gtl55
gtl55
7 years ago
Reply to  STS

Agreed, this is obviously aimed at gravel bikes that almsot all run on a 135 or 142/12 rear. The chain line should have been made to be 46/47mm’s for such frames. 43.5 makes no sense at all.

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Veganpotter
Veganpotter
8 years ago

I’m not interested in round rings but I’m amazed at how low the price is for what you’re getting.

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VeloKitty
VeloKitty
8 years ago

So with the cranks it’s like $500? Yikes.

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drosser
drosser
8 years ago
Reply to  VeloKitty

FSA are supposedly making 48/32 and 46/30 cranks that don’t cost an arm and a leg.

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pTymnWolfe
pTymnWolfe
8 years ago
Reply to  drosser

True, but it’s FSA. You get what you pay for.

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Greg Simmons
Greg Simmons
8 years ago
Reply to  drosser

I own a 48/32 on my kid puller…paired up to a 11-36 and I get some amazing range on a road hybrid

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Greg Simmons
Greg Simmons
8 years ago
Reply to  Greg Simmons

You can only get it oem from specialized or from eBay as take off

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Morten Knudsen
Morten Knudsen
8 years ago

super compact, disc brakes an really big volume tires is the ‘new black’ – and im loveing it…

we just need campy and ShimaNO to follow suit on super compact. 46/11 i sufficient for most people and sub 1:1 gearing is damm nice for everyone but racers – for climbing and bikepacking its ideal…

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Omair
Omair
8 years ago

I’ve never seen a straight rotor big chainring, hopefully they’ll get that sorted with these

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Jack
Jack
8 years ago

If they also started making crank lengths down to 145 mm or so, this could be amazing for shorter riders like my girlfriend. She needs a 150 crank at most… cheapest way to get a decent crank today is to get a machine shop to shorten SRAM Apex ones.

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