Cannondale Si SL2 Road to Mtb Crank Conversion

[Sid the Sloth]

Evening all.

 

I’m thinking of doing an everesting, and I was hoping to find out if I could convert my Supersix’s 53/39 spidering on si sl2 cranks to a 1x MTB chainring, I’m thinking 30t cannondale spidering. The reason I want to do this is because I am running campy super record and my max rear cog is 29, and this seems like a cheaper option if possible than a drivetrain upgrade.

 

If you have any knowledge on the topic, please let me know!

[DieselnDust]

Evening all.

 

I’m thinking of doing an everesting, and I was hoping to find out if I could convert my Supersix’s 53/39 spidering on si sl2 cranks to a 1x MTB chainring, I’m thinking 30t cannondale spidering. The reason I want to do this is because I am running campy super record and my max rear cog is 29, and this seems like a cheaper option if possible than a drivetrain upgrade.

 

If you have any knowledge on the topic, please let me know!

 

 

yes yo can, just change the rings. They use the same interface

[stringbean]

Yip as said just change the chainring.

I would however consider something bigger than a 30.

perhaps 32 or 34.

There is a chance your chain going to be too long and too much chain slack.

You don’t really want to have to shorten your chain I’m sure.

[Sid the Sloth]

Yip as said just change the chainring.

I would however consider something bigger than a 30.

perhaps 32 or 34.

There is a chance your chain going to be too long and too much chain slack.

You don’t really want to have to shorten your chain I’m sure.

I would have thought from running a 53/39 I was going to have to run a shorter chain anyway though... save some weights in links #weightweenies

[Jewbacca]

Where are you everesting?

 

1:1 ratio is super light. It must be a super steep hill.

 

I have found when really tired my small/fast muscles get really tired quicker, so spinning actually gets more difficult and I land up grinding a bigger gear as my big/slow muscles aren't 100% ded yet.

 

That being said my current road bike set up is 50?34 with an 11/32 cassette so who am I to judge! hahahahaha

[Sid the Sloth]

Where are you everesting?

 

1:1 ratio is super light. It must be a super steep hill.

 

I have found when really tired my small/fast muscles get really tired quicker, so spinning actually gets more difficult and I land up grinding a bigger gear as my big/slow muscles aren't 100% ded yet.

 

That being said my current road bike set up is 50?34 with an 11/32 cassette so who am I to judge! hahahahah

I’ve narrowed it down to three options, 1.4km @ 9.4%, 2.1km @ 8.2%, and 1,5 @ 10%. I like the idea of the 30 because I then I have some extra if I’m not feeling so hot. I’d rather over compromise for the ascent and lose out a bit on the descent. 

[Ispeed_V]

I currently run a 1x11 on my Ultegra crank.

 

Have a 38t Absolute Black Oval paired with a 11-32 rear cluster. 

 

Only thing I needed to do was shorten the chain slightly to reduce the chain slack.

[Pure Savage]

I’ve narrowed it down to three options, 1.4km @ 9.4%, 2.1km @ 8.2%, and 1,5 @ 10%. I like the idea of the 30 because I then I have some extra if I’m not feeling so hot. I’d rather over compromise for the ascent and lose out a bit on the descent. 

Not sure which one is Price drive but that 30T will be spot on. Now, where to get you that 30T for the weekend.

[Pure Savage]

yes yo can, just change the rings. They use the same interface

No spacers required?

[Jewbacca]

I’ve narrowed it down to three options, 1.4km @ 9.4%, 2.1km @ 8.2%, and 1,5 @ 10%. I like the idea of the 30 because I then I have some extra if I’m not feeling so hot. I’d rather over compromise for the ascent and lose out a bit on the descent. 

Ja... at 8 to 10 percent it is fair.

 

Rad. Enjoy!

[dirtypot]

My advice would be to go for the one with the most distance.  Being repetitive on a short course gets really old really fast.  
Are those distances complete laps?  None of them are particularly long...  

 

Let us know where and when you're planning on doing it - having people pop by randomly is a huge help to the morale.  

[DieselnDust]

No spacers required?

 

 

Nope he's not changing the axle as far as i can tell. The Spiderring is 0mm offset so it should line up in the space inbetween where the 53 and 39 chainrings were.

The Spiderring in question is also a NW design so there should be no need for a chain guide either. Should be spending most of the time in the middle sprockets anyway

[Sid the Sloth]

Thanks for the help everyone, I really appreciate it.

 

If anyone has a 30t spidering lying around, please let me know!

 

I’ll create another thread with more details about the attempt closer to the time.

 

https://bikehub.co.za/classifieds/item/chainrings/442979/cannondale-spidering-30t

 

Thanks again