Rockrider E-st 900 changes upgrades

E-MAD MALC

Active member
Subscriber
Nov 16, 2021
306
153
EAST SUSSEX
The 500 or the 900 ?
900
It was pandemic time when I purchased it
They only had 500 in stock at the time in the UK so I purchased one, I kept looking on the Web site once I had the bike and would you believe it the 900 come in stock two weeks further on so I got in touch with Decathlon and said I really wanted the 900 they said no problem
Ordered the 900 in the shop and they took the 500 back
Nice one 👍
 

El Grifo

Active member
Apr 4, 2023
86
136
Islas Canarias
900
It was pandemic time when I purchased it
They only had 500 in stock at the time in the UK so I purchased one, I kept looking on the Web site once I had the bike and would you believe it the 900 come in stock two weeks further on so I got in touch with Decathlon and said I really wanted the 900 they said no problem
Ordered the 900 in the shop and they took the 500 back
Nice one 👍
Almost the same here.
The 900 felt a little outwith my price range, but owing to the 2 months no quibble return policy of Decathalon Spain, I reckoned to start with the 500.
Do not get me wrong, the 500 is an OK bike, I was starting to love it.
Prob is I am 72 and although the 500 just about works for me now, how is it going to be in a couple of years ??
I returned it in favour of the 70Nm Brose T hoping that might help my riding longevity

Wish me luck :)
 

E-MAD MALC

Active member
Subscriber
Nov 16, 2021
306
153
EAST SUSSEX
Almost the same here.
The 900 felt a little outwith my price range, but owing to the 2 months no quibble return policy of Decathalon Spain, I reckoned to start with the 500.
Do not get me wrong, the 500 is an OK bike, I was starting to love it.
Prob is I am 72 and although the 500 just about works for me now, how is it going to be in a couple of years ??
I returned it in favour of the 70Nm Brose T hoping that might help my riding longevity

Wish me luck :)
Your not alone I'm only a year behind you
 

BeBiker

Active member
Aug 26, 2020
663
404
Belgium
I hear from most other owners that the e-st900 is really good.
It doesn't have fancy features like remote 12 speed, 4-pot brakes etcetera, but a very decent basic bike.

When trying to shave off some hundreds of euros, you end up with the "Ok-ish" 520 and 500, or with the e-st100 which is a complete disaster.

Do you plan to do some changes? Dropper post, tyres, riser steering bar, gears ?
 

BeBiker

Active member
Aug 26, 2020
663
404
Belgium
I found this on the UK site, but not on the BE site:

Screenshot 2023-04-08 123203.jpg

I hope the helpdesk provides me a solution
 

El Grifo

Active member
Apr 4, 2023
86
136
Islas Canarias
I hear from most other owners that the e-st900 is really good.
It doesn't have fancy features like remote 12 speed, 4-pot brakes etcetera, but a very decent basic bike.

When trying to shave off some hundreds of euros, you end up with the "Ok-ish" 520 and 500, or with the e-st100 which is a complete disaster.

Do you plan to do some changes? Dropper post, tyres, riser steering bar, gears ?
Only planned changes are one of those Suntour ncx or whatever suspension posts with a more comfortable saddle and a 38t chainring.
No doubt after the first few rides there will be more !
 
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El Grifo

Active member
Apr 4, 2023
86
136
Islas Canarias
Been a couple of weeks now since I picked op the 900. Decathalon accepted the return of the 500 with barely a look and the money was refunded to my account the same day. Excellent service !
The only Mods I have done so far really are to replace the normal head to a raised version to suit my somewhat elderly situation.
The second being the fitting of the excellent Suntour NCX saddle suspension device.
My riding style although not Dick Danger ( or at my time of life, not even Danger Dick these days) is still quite sporty.
Did 28k yesterday over some rugged terrain and the suspension unit performed beautifully.

Best money spent so far !!

Trying to source a 38T Chainring now.

Ignore the lousy phone mount. Work in progress :)
20230415_143440-01 (1).jpeg
20230416_123311-01.jpeg
20230416_123259-02.jpeg
 

El Grifo

Active member
Apr 4, 2023
86
136
Islas Canarias
At it again !!!

This is sure to pixx off the purists !!
Fitted similar to my old Muddy Fox over 35 years ago and found the great when returning from a pretty heavy ride out.

Real relaxing just to cruise along in the breeze, with an almost straight back when the traffic on the Road or Cycle Path is quiet.
If I like them, then they remain. If not, it is only a case of 2 Allen Bolts !!

End Plugs not yet fitted until trial period is over.

Prob go for a better set of handgrips as well. Had to butcher the originals.

El G.
20230416_152116-01.jpeg
 

eduardve

New Member
Aug 22, 2023
4
1
RO
This is a picture of the bike with rain fenders installed.
I had to drill a 5mm hole in the front fork, then tapped M6 in it.

In the back there was the possibility to mount the fender support directly.

This is the reference to the fenders. the normal size.

They are narrower than the 27.5-2.8 tires, but as these tires are "bombed", the fenders keep away 90% of the rain.

It was the only model that was:
-quick click remove
-budget
-good close following of the tire
-not too much destroying the looks, no side supports etc.

View attachment 38983

View attachment 38999
Hi,
how did the fenders last over time? I am thinking of buying this model as well but I'm not sure if I will be able to fix the fender for the front wheel in order to keep it steady. Could you post a picture of the setup detail please? Thank you!
 

DT36

Member
Sep 17, 2020
69
67
S. Wales
Have you considered a tie on front mudguard?
I have had a Zefal fitted for over 2 years now and it's been absolutely perfect. Very easy to fit. Would recommend :)
See the back spray/mud on my frame, which was from a very wet and muddy trail this weekend.
When I didn't have the mudguard fitted I found a lot of the spray was coming up onto my face. Now it doesn't.






PXL_20230918_092105762.png

PXL_20230918_092059801.png PXL_20230918_092114811.png
 

BeBiker

Active member
Aug 26, 2020
663
404
Belgium
Hi,
how did the fenders last over time? I am thinking of buying this model as well but I'm not sure if I will be able to fix the fender for the front wheel in order to keep it steady. Could you post a picture of the setup detail please? Thank you!
Still Ok, still as new.

The mounting is a metal bracket with one bolt.
At the back there is already a hole, in the front you will have to drill/tap a hole
 
Last edited:

eduardve

New Member
Aug 22, 2023
4
1
RO
Still Ok, still as new.

The mounting is a metal bracket with one bolt.
At the back there is already a hole, in the front you will have to drill/tap a hole
20230918_191525.jpg


In the front did you full drilled thru the middle triangle? (it seems no so thick)
 

emanuele27

New Member
Oct 9, 2023
2
5
Italia
I want to give credit to the contributor of this post.

In terms of lighting for electric bikes, here's the information:

FRONT 6V 1.1A (6.6W)

BACK 6V 0.1A (0.6W)

The best lighting options are:

FRONT: Lezyne E65 (210 Lumens - be careful not to get the "Pro" version) - 4.5W

BACK: LITEMOVE TS-RK - 0.5W

To achieve this, you'll need to purchase a Brose cable from Decathlon.
WhatsApp Image 2023-10-10 at 09.28.30.jpeg
WhatsApp Image 2023-10-10 at 09.28.27.jpeg
WhatsApp Image 2023-10-10 at 09.28.30 (2).jpeg
WhatsApp Image 2023-10-10 at 09.28.30 (1).jpeg
WhatsApp Image 2023-10-10 at 09.28.27 (1).jpeg
 

emanresu

New Member
Feb 28, 2023
3
0
Home
Just installed the decathlon cable for a fork mount light at the front. Waiting for a clamp for the crown as don't want to drill.

Is this the light for the rear?

 

BeBiker

Active member
Aug 26, 2020
663
404
Belgium
Since a few weeks, the motor assembly started making a bit more noise.
When manually turning the pedals, I can feel it's not as smooth as used to be.

I guess there are belt/bearing problems.

Is this something I can fix myself?
How is Decthlon service and Price?
Are there shops specialized in this?
 

RonnieX

Member
Jul 3, 2020
90
77
Northwest
Since a few weeks, the motor assembly started making a bit more noise.
When manually turning the pedals, I can feel it's not as smooth as used to be.

I guess there are belt/bearing problems.

Is this something I can fix myself?
How is Decthlon service and Price?
Are there shops specialized in this?
If it's a serious motor problem, then These guys are the Brose experts.
 

E-MAD MALC

Active member
Subscriber
Nov 16, 2021
306
153
EAST SUSSEX
Since a few weeks, the motor assembly started making a bit more noise.
When manually turning the pedals, I can feel it's not as smooth as used to be.

I guess there are belt/bearing problems.

Is this something I can fix myself?
How is Decthlon service and Price?
Are there shops specialized in this?
This will give you an idea what it takes to replace the belt drive
 

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