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

New: Take Part in the new April's Giveaway for a Chance to Win the Euybike S4 Pro Max ebike worth $1299


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...

Forum Jump:

[-]
10 Latest Posts
Unlocking speed on my e-bike.
Today 01:04 PM
MTB handlebar width
Today 06:25 AM
What is your favorite MTB trail/route in...
Today 06:16 AM
What are the best cost effective ways to...
Today 06:07 AM
Bridgestone Blouson bike.
Yesterday 07:57 PM
Thoughts on paceline riding
Yesterday 05:51 PM
2011 GT Tachyon upgrade/mod
Yesterday 05:04 PM
RECOMMENDATION
Yesterday 05:01 PM
Injury Recovery
Yesterday 04:59 PM
1987 Tommaso Alloy lugged frame
Yesterday 04:58 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. GirishH
22 posts
no avatar 2. enkei
16 posts
no avatar 3. SPINMAN
15 posts
no avatar 4. Flowrider
15 posts
no avatar 5. meamoantonio
13 posts