chainring /bash guard conversion

Sorting out your thrunge brackets, fettling your inter-rositers and even stuff about bike parts.
mogulkila
Posts: 26
Joined: Fri May 04, 2012 20:47 pm

chainring /bash guard conversion

Postby mogulkila » Fri Dec 14, 2012 21:49 pm

i,ve got a 2011 stereo cube and i want to convert from a 3 chain ring to to a 2 and fit a bash guard and chain guide ,my question is what tools will i need to do the job,the reason i ask i dont want to buy a whole lot of the wrong tools for the the job...

thanks dave

User avatar
cooldad
Posts: 28191
Joined: Sat Apr 17, 2010 22:01 pm

Re: chainring /bash guard conversion

Postby cooldad » Fri Dec 14, 2012 23:06 pm

An allen key to remove the ring and fit the bash. Plus something to hold the other side of the chanring bolt - either a specific tool, big screwdriver or something.
Chain guide - depends on what. But why do you need one? You still have the mech.
I don't do smileys.

There is no secret ingredient - Kung Fu Panda

London Calling on Facebook

Parktools

User avatar
The Rookie
Posts: 23069
Joined: Thu Apr 30, 2009 09:29 am

Re: chainring /bash guard conversion

Postby The Rookie » Sat Dec 15, 2012 07:30 am

Thick plastic bashes will need longer bolts.....

Screwdriver to adjust the front mech high stop!

mogulkila
Posts: 26
Joined: Fri May 04, 2012 20:47 pm

Re: chainring /bash guard conversion

Postby mogulkila » Sat Dec 15, 2012 08:18 am

sorry ,needed more specific info ..... :idea: i didn't make myself very clear i want to take the chainrings off and the pedal arm so i can fit a chain guide the question is what tools do i need for the job because of what type of crank would determine the type of tool req.

User avatar
The Rookie
Posts: 23069
Joined: Thu Apr 30, 2009 09:29 am

Re: chainring /bash guard conversion

Postby The Rookie » Sat Dec 15, 2012 10:06 am

What type of chain guide? What mounting to the bike (BB, ISCG, ISCG2, seat tube), what cranks you removing on what BB style?

The pedal 'arm' is normally called a crank by the way.

Why are you fitting a chainguide at all?

User avatar
The Northern Monkey
Posts: 19547
Joined: Thu Jun 05, 2008 18:13 pm

Re: chainring /bash guard conversion

Postby The Northern Monkey » Sat Dec 15, 2012 10:16 am

What cranks are they?

mogulkila
Posts: 26
Joined: Fri May 04, 2012 20:47 pm

Re: chainring /bash guard conversion

Postby mogulkila » Sat Dec 15, 2012 11:04 am

Shimano slx I think

User avatar
The Rookie
Posts: 23069
Joined: Thu Apr 30, 2009 09:29 am

Re: chainring /bash guard conversion

Postby The Rookie » Sat Dec 15, 2012 11:44 am

So to remove the Crank and refit you'll need the HT2 preload tool and an allen key for the pinch bolts.

Sp now what chainguide? Why do you think you need one?

mogulkila
Posts: 26
Joined: Fri May 04, 2012 20:47 pm

Re: chainring /bash guard conversion

Postby mogulkila » Sat Dec 15, 2012 12:14 pm

the only reason i want to fit a chain guide is to stop the chain from being so sloppy/coming off occasionally .. all the usual reasons really and for which chain guide i havent decided yet :?

User avatar
cooldad
Posts: 28191
Joined: Sat Apr 17, 2010 22:01 pm

Re: chainring /bash guard conversion

Postby cooldad » Sat Dec 15, 2012 15:18 pm

A chain guide won't stop the chain being 'sloppy' and you already have a tensioner (rear mech), and a guide (front mech).
I don't do smileys.

There is no secret ingredient - Kung Fu Panda

London Calling on Facebook

Parktools

User avatar
The Rookie
Posts: 23069
Joined: Thu Apr 30, 2009 09:29 am

Re: chainring /bash guard conversion

Postby The Rookie » Sat Dec 15, 2012 16:10 pm

When you loose the larger chainring you'll need to shorten the chain which will remove some slop anyway!

hainman
Posts: 605
Joined: Wed May 26, 2010 07:10 am

Re: chainring /bash guard conversion

Postby hainman » Wed Dec 26, 2012 17:43 pm

sorry to hijack but im just about to buy a bash guard and remove large ring.not using chain guide but how many links need to be reomoved to run just the small and middle rings??

Thanks

Craig
Giant Reign 2
Crohnie

User avatar
The Rookie
Posts: 23069
Joined: Thu Apr 30, 2009 09:29 am

Re: chainring /bash guard conversion

Postby The Rookie » Wed Dec 26, 2012 18:26 pm

The right number to size the chain properly, big/big (without threading through the rear mech) plus one pair of links (one inner, one outer).

If the chain is the right size now, how many you need to remove will depend on what size chainrings you have!

hainman
Posts: 605
Joined: Wed May 26, 2010 07:10 am

Re: chainring /bash guard conversion

Postby hainman » Wed Dec 26, 2012 19:00 pm

Sorry dont quite follow the big big link thing,im looking to take out the 44t large and keep the middle and granny...32-22 I think,Deore crank set on Rockrider 9.1.....chain is ok right now,
Giant Reign 2
Crohnie

User avatar
cooldad
Posts: 28191
Joined: Sat Apr 17, 2010 22:01 pm

Re: chainring /bash guard conversion

Postby cooldad » Wed Dec 26, 2012 19:39 pm

The big one that's left. Currently the middle one.
I don't do smileys.

There is no secret ingredient - Kung Fu Panda

London Calling on Facebook

Parktools

User avatar
The Rookie
Posts: 23069
Joined: Thu Apr 30, 2009 09:29 am

Re: chainring /bash guard conversion

Postby The Rookie » Wed Dec 26, 2012 21:51 pm

Chain may be OK and still not right, however if it is right then you'll need to remove 6 links (3 pairs) (44T has a 180degree wrap of 22, 32T of 16, 22-16=6).

Go on the parktools website and see how to do it PROPERLY. (wrap the chain round the new biggest ring at each end, not going through the rear mech, and overlap by one pair of links, that is your correct length.)

User avatar
bennett_346
Posts: 5072
Joined: Mon May 03, 2010 09:47 am

Re: chainring /bash guard conversion

Postby bennett_346 » Thu Dec 27, 2012 15:29 pm

Try a chain tensioner like a blackspire stinger.

hainman
Posts: 605
Joined: Wed May 26, 2010 07:10 am

Re: chainring /bash guard conversion

Postby hainman » Thu Dec 27, 2012 19:09 pm

thanks The beginner....was struggling to follow the instruction but understand now,i'll have a look on parktool website,on another note,will i need to take the whole crankset of the bottom bracket?? As i dont have the tool for the hollowtech BB...
Giant Reign 2
Crohnie

User avatar
cooldad
Posts: 28191
Joined: Sat Apr 17, 2010 22:01 pm

Re: chainring /bash guard conversion

Postby cooldad » Thu Dec 27, 2012 19:30 pm

The cranks, not the BB.
I don't do smileys.

There is no secret ingredient - Kung Fu Panda

London Calling on Facebook

Parktools

hainman
Posts: 605
Joined: Wed May 26, 2010 07:10 am

Re: chainring /bash guard conversion

Postby hainman » Thu Dec 27, 2012 19:36 pm

yes thats what i mean,but dont i need a tool the takes the cranks off the BB??
Giant Reign 2
Crohnie


Return to “MTB Workshop & Tech”

Who is online

Users browsing this forum: No registered users and 3 guests