Decathlon STILUS Full Suspension Electric Mountain Bike - SRAM SX

[R120]

View attachment 43151
Hi guy's just fitted this New chain ring but the lower chain it dragging on the tire in first gear. Any advice would be great thanks you

What is the chain ring? May have altered the chainline

 

[moonhead911]

And this is the original witch is off set a few mm

 

[Johnny rider]

What is the chain ring? May have altered the chainline

It’s the Bosch spider he is using I’ve got the same issue but making a spacer up

 

[Jamze]

It’s the Bosch spider he is using I’ve got the same issue but making a spacer up

Just googled that part number - it's non-Boost. Do they do a Boost one? FSA do I think.

chain line : Standard chain line (non Boost), optimized for Bosch BDU4XX drives

 

[Johnny rider]

Just googled that part number - do they do a boost one? FSA do I think.

chain line : Standard chain line (non Boost), optimized for Bosch BDU4XX drives

Very hard to find bud

 

[Johnny rider]

I’ve added 3mm space to the chainring and that’s the clearance on the rear tyre 2.8 wide

I’m making a spacer to fit on the shaft of the motor and remove the 3mm spacers on the chainring hopefully that will work

 

[RustyMTB]

Chainring offset was my thought too. Not had time to get into the exact specs but Superstar are decent for upgrades. Might find something suitable there.

Narrow Wide Rings - ROUND - Superstar Components

Narrow Wide Rings - ROUND

www.superstarcomponents.com

 

[Jamze]

Very hard to find bud

Prob worth double-checking the FSA part numbers, they look different...

Here or here?

 

[Johnny rider]

FSA Bosch E-Bike Spider | Tredz Bikes

Save 16% - FSA Bosch E-Bike Spider £25.95 or available with 0% APR finance on baskets over £99. All E-Bike Chainrings are delivered free to the UK mainland*, 365 day returns & Price Match. Buy Now.

www.tredz.co.uk

 

[Johnny rider]

Prob worth double-checking the FSA part numbers, they look different...

Here or here?

That looks a better option bud

 

[moonhead911]

What's the difference between boost and normal

 

[Jamze]

What's the difference between boost and normal

Your front and rear hubs are wider (110mm and 148mm). Consequently, the drivetrain is shifted outwards, which means your chainring should also sit further out. My understanding, anyway ? Non-boost is 100mm front and 142mm rear. So you either need Boost components, or will need to adjust with spacers.

 

[Tallguy888]

Yes all straight. Original chainring had a bigger offset which brought it further out than this one

Hi, notice you have the same Bosch spider as me, which is the normal chain line of 50mm we both need the boost version that gives us 53mm,only stock I can find is in Italy ?

 

[moonhead911]

Hi, notice you have the same Bosch spider as me, which is the normal chain line of 50mm we both need the boost version that gives us 53mm,only stock I can find is in Italy ?

Looks like me and Jonny bought the last uk stock

 

[Tallguy888]

Bugger ?

 

[Tallguy888]

Could you confirm which one you purchased so I don’t waste my cash, many thanks Del

 

[moonhead911]

 

[Tallguy888]

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View attachment 43268

Great, much appreciated ?

 

[Johnny rider]

Great, much appreciated ?

You might have to order from fsa like I did can’t get it anywhere else

 

[Tallguy888]

You might have to order from fsa like I did can’t get it anywhere else

I just found one on eBay from Italy, was £8 more than UK so not too bad..should arrive before Xmas ?

 

[Tallguy888]

I just found one on eBay from Italy, was £8 more than UK so not too bad..should arrive before Xmas ?

You might have to order from fsa like I did can’t get it anywhere else

i didn’t even think about ordering it direct ?

 

[Johnny rider]

i didn’t even think about ordering it direct ?

£40 delivered from fsa

 

[Tallguy888]

£40 delivered from fsa

And much quicker than Italy will be, ah well gives me something to look forward too I guess...

 

[Johnny rider]

And much quicker than Italy will be, ah well gives me something to look forward too I guess...

Not sure where it’s coming from was €43 in all bud

 

[Tallguy888]

Not sure where it’s coming from was €43 in all bud

Worked out £44 from Italy, probably be a week or two delivery, bike rides fine so not a problem waiting I don’t think..be interesting to see how much extra gap I get from tyre to chain and if it shifts smoother because it’s pretty good anyway.

 

[Johnny rider]

Worked out £44 from Italy, probably be a week or two delivery, bike rides fine so not a problem waiting I don’t think..be interesting to see how much extra gap I get from tyre to chain and if it shifts smoother because it’s pretty good anyway.

I’m only getting it so I can use my own chainring can swap out easy then

 

[Tallguy888]

I’m only getting it so I can use my own chainring can swap out easy then

Like wise, also the one that was on the bike was pretty heavy.

 

[Johnny rider]

Like wise, also the one that was on the bike was pretty heavy.

Yes i found that out the other day it weighs a ton lol

 

[Buzz720]

Has anyone put 27.5 2.8 inch tires on it?

 

[Johnny rider]

Has anyone put 27.5 2.8 inch tires on it?

Yes e wilds 2.8