Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the July Giveaway for a brand new 26" Thruster® Street Style BMX Cruiser Bicycle

New product launch: WIN an innovative aeroe Spider Rear Rack


Shimano ST-EF51 query
#1
hiya folks,
i'm after a bit of advice if you'd be so kind.

a few months back i purchased a B'Twin 5.0 RockRider mountain bike.

http://www.decathlon.co.uk/rockrider-50-men-id_8202062.html

now i'm thinking of changing the gear shifters as i've found that the 'gripshift' system already on it is too unstable for what i want... i slight unintentional twist of the hand whilst riding and the gears will jump down without a second thought......

the bike is fitted with a Shimano TZ-30 front derailleur,
a Shimano Rear Derailleur - no numbers on it, just the letters SIS
and SRAM MRX 21-speed (3x7) grip shifters,
oh and a Shimano TZ-21 freewheel

i would like to change to the Shimano ST-EF51 shifters......

http://www.ebay.co.uk/itm/290942217645?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

now my question is this...will the EF-51 work with the rest of the derailleur set-up ? or will i have to change other parts ?

many thanks for any replies.
  Reply
#2
If the number cogs and chain rings match, there will be no problem with function.
Nigel
  Reply
#3
You will need to run the new gear shift cables through the new shifters & your bikes existing cable housing, not a daunting task. The brake cables & housings will simply reconnect to the new levers, extremely simple. Your grips may need to be replaced as the existing length may be too short for the new shifters.
  Reply
#4
thanks for the replies gents.. it's much appreciated..
  Reply
#5
So the MRX grip shifters have the same cable pull as shimano? Or is the difference SRAM - Shimano only at 8speed and higher? I admit I was a bit confused when I read it...
  Reply
#6
SRAM MRX and TRX are Shimano compatible, and will not work with SRAM rear derailleurs. SRAM has at least one other Shimano compatible series of shifters.
Nigel
  Reply
#7
Thanks for clearing that up (again, I guess)!
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
13,102
06-03-2010, 12:09 PM
Last Post: DaveM

Forum Jump:

[-]
10 Latest Posts
26" Thruster® Street Style BMX | July 20...
Today 07:32 AM
Post a photo for aeroe Spider Rear Rack
Today 02:29 AM
Requested question
Yesterday 11:20 PM
Ceramic Oversize Pulley
Yesterday 11:07 PM
RD Alignment
Yesterday 03:40 PM
2020 road cycling season
Yesterday 02:55 PM
Taylor Phinney retires
Yesterday 02:54 PM
Axle is clunky/not spinning smoothly, is...
Yesterday 12:06 PM
replacement chain
Yesterday 11:35 AM
Dork disc - remove it or keep it?
07-12-2020 09:10 PM

[-]
Top 5 Posters This Month
no avatar 1. Jesper
80 posts
no avatar 2. CharleyFarley
23 posts
no avatar 3. Painkiller
11 posts
no avatar 4. Papa Dom
10 posts
no avatar 5. RoadRacer2020
7 posts