Swap Como 4.0 48T chainring with Vado 4.0 40T chainring

[TS25]

And of course they have colour matching BOLTS, I presume?

Not shure about matching blue, check:

Chainring Bolts Set

A set of 5 colorful anodized chainring bolts to enhance the detail level of your bike. COMPATIBILITY INFORMATION: M8.5 x 0.75 for 76BCD chainrings only. M8 x 0.75 for all other BCD chainrings, including 104BCD, 110BCD, 130BCD.

www.garbaruk.com

 

[Stefan Mikes]

@TS25: Of course, they have the bolts, too!

Chainring Bolts Set

A set of 5 colorful anodized chainring bolts to enhance the detail level of your bike. COMPATIBILITY INFORMATION: M8.5 x 0.75 for 76BCD chainrings only. M8 x 0.75 for all other BCD chainrings, including 104BCD, 110BCD, 130BCD.

www.garbaruk.com

Please tell me: There is extremely tight clearance between the motor chamber and the ring. Isn't it some trouble? Perhaps that's the reason Specialized chainring has threaded holes to avoid using the sleeve?
P.S. Any torque specs available?

 

[TS25]

Please tell me: There is extremely tight clearance between the motor chamber and the ring. Isn't it some trouble? Perhaps that's the reason Specialized chainring has threaded holes to avoid using the sleeve?
P.S. Any torque specs available?

No problem at all in using the 2-piece-chainringbolts, there is a lot of space.

I can't remember the torque specs presently but think I've used the usual ones for "allen 5 / M8". And Loctite blue.
Aluminium = class 5.6 = 11-12 Nm:

Anzugsdrehmoment Tabelle M2 bis M68

Drehmoment Tabelle M2 bis M68 Anzugsmoment Schrauben, Drehmoment Schrauben, Anzugsdrehmoment Tabelle für metrische Regelgewinde

www.anzugsmoment.de

 

[TS25]

P.S. Any torque specs available?

I can't remember the torque specs presently but think I've used the usual ones for "allen 5 / M8". And Loctite blue.
Aluminium = class 5.6 = 11-12 Nm:

Parktool general guideline calls up 44-88 inch-pound for aluminium chainring bolts, that equals 5-10 Nm
(Parktool: 70-124 inch-pounds for steel bolts).

5 Nm seem too low to me but you should be fine with 9-10 Nm.
You could fasten the chainring bolts with cable ties in addition as a security against loss in the beginning until you're shure. Some say you don't need Loctite when you have the correct Nm applied.

 

[Sierratim]

P.S. Any torque specs available?

Stefan, this ARTICLE links to a Shimano manual that quotes large MTB chain ring torque specs of 14-16 Nm. Be sure to add a drop of 'blue' thread lock when reinstalling the bolts.

 

[Stefan Mikes]

Thank you, Tim!

 

[TS25]

Stefan, this ARTICLE links to a Shimano manual that quotes large MTB chain ring torque specs of 14-16 Nm.

Here is the link to a new version of that general Shimano document DM-GN0001-24.ENG:

Manuals & Technical Documents

but on page 141 ff. the hints are for Shimano double or triple chainwheel sets only.

No hints for single setups like Vado and Como have. No differentiation between aluminium or steel chainring bolts.

But I suppose the Shimano hints are for steel chainring bolts.

 

[Stefan Mikes]

Guys, I will make you shocked. Since the User Manuals seem to have disappeared from Specialized Website, I found mine, paper version. Guess what torque is needed to tighten the Specialized aluminium chainring bolt? 9.8 Nm

 

[Sierratim]

Guys, I will make you shocked. Since the User Manuals seem to have disappeared from Specialized Website, I found mine, paper version. Guess what torque is needed to tighten the Specialized aluminium chainring bolt? 9.8 Nm

Good find! I'm adding that note to my torque spec sheet...

 

[bellandbottle]

I don't know if this will be of any interest?

 

[Stefan Mikes]

I don't know if this will be of any interest?

Very good! 10 Nm is so close to 9.8. Thank you!

 

[Stefan Mikes]

For anybody interested with Specialized chainring replacement:

Changing gearing on my Vado 5

Thank you, Marcela. That's why I asked the mechanic to inspect that. My brother is a good mechanic but with too little of experience on derailleur setup :) After 4-500 miles I like to retension the headset bearings also;).

electricbikereview.com

If you need to replace the original chainring of Vado/Como, you better find and buy the original Praxis ring. It requires 5 minutes of easy work, a 5 mm hex wrench, a Phillips screwdriver, and threadlocker liquid.

While replacing the ring with Deckas or Garbaruk requires buying an extra bolt-set, a chainring nut wrench, and is a troublesome process that ultimately might involve drilling 4 holes if you intended to re-use the chainguard...

 

[Art Deco]

In summary, you used the same chain ring size and same chain length in new stock, yes?

 

[Stefan Mikes]

In summary, you used the same chain ring size and same chain length in new stock, yes?

Yes. Only the bike mechanic told me he used 128 chain links with the new chain instead of 126. He believed 126 links created unnecessary tension.

 

[Art Deco]

Yes. Only the bike mechanic told me he used 128 chain links with the new chain instead of 126. He believed 126 links created unnecessary tension.

Sounds reasonable. Could break a chain, maybe.

 

[Stefan Mikes]

@Art Deco, it is hard to describe how well designed my Vado is for the purposes I bought it. For instance, I could not have any better brakes or lighting. The 48T/11-46T drive-train just rocks and it proved itself on mountain roads (not that extreme as experienced by Sierratim, true). The Electrak tyres are fast (and only not good off-road). And so on and so on. If I travel to the mountains again, that will be my Trance E+ anyway

 

[TS25]

@Art Deco, it is hard to describe how well designed my Vado is for the purposes I bought it.

Now just imagine what it could be like if it had the fasterestest chainring in that fantastic red

 

[Art Deco]

On color, I should mention that I am riding a two tone now, as I am trying to drain my wife's battery for storage. Pink and Blue.

 

[Stefan Mikes]

if it had the fasterestest chainring in that fantastic red

We call it "The Galician Look" in Poland with the reference to the Polish Galicia. Another descriptor would be "Everything from different parishes"

 

[Sierratim]

We call it "The Galician Look" in Poland with the reference to the Polish Galicia. Another descriptor would be "Everything from different parishes"

Like Dolly Parton's "Coat of Many Colors"?