Boardman bike making a sound.

[lydiaald]

Hi, my husband purchased the Boardman MTX 8.8 Mens Hybrid Bike. The gears didn’t all work on the bike so we had trim shifters fitted. Whilst this has sorted the issue for the most part it’s still making a noise when in the highest gear. Is there any solution to this? We thought trimming may solve this but it hasn’t. We did read if you put a grx rear derailleur on this may help? Does anyone have any experience with this bike and found a solution?
Thanks

 

[Yellow Saddle]

Before we answer, prove that you are still watching the thread.

 

[Ajax Bay]

Before we answer, prove that you are still watching the thread.

Tbf they did come back this evening at 20:46. So give benefit of doubt and your pearls.
https://www.boardmanbikes.com/gb_en/products/2352-mtx-8.8-2021.html

• Shifter: Shimano Deore 2x10
• Rear Derailleur: Shimano Deore 10 speed
• Front Derailleur: Shimano Tiagra FD-4700

 

[Sharky]

Should the OP return ....

I think we need more info to solve this one.
A video with sound
Photos from the front, rear and side

Even with this info, it will be difficult without getting close in person.

Hope you fix it.

 

[C R]

If the bike was bought from new they should go back to to the place that sold it, otherwise the warranty will be void.

 

[roubaixtuesday]

What are "trim shifters"?

 

[Sharky]

What are "trim shifters"?

Had heard of the expression before and Google confirms ....

Some road bikes will come equipped with a front derailleur that has a “trim” feature. The trim allows you to make small adjustments to the front derailleur that will eliminate chain rub, but not cause a full shift into another chain ring.

Allows minute adjustment of the front changer to stop chain rub. I don't think you can get them for the RD. Might as well go back to friction changers.

 

[roubaixtuesday]

Had heard of the expression before and Google confirms ....

Some road bikes will come equipped with a front derailleur that has a “trim” feature. The trim allows you to make small adjustments to the front derailleur that will eliminate chain rub, but not cause a full shift into another chain ring.

Allows minute adjustment of the front changer to stop chain rub. I don't think you can get them for the RD. Might as well go back to friction changers.

Sorry, yes, I'm familiar with the concept. I was rather wondering what the exact shifters were before and after the change, and how exactly the "not all the gears worked" manifested itself.

As others have said, the bike shop should have sorted this, and for sure whatever the original shifters were should have worked - Boardman is a reputable brand, and according to their website the bike comes with "Deore 2x10" shifters - of which there appear to be several variants so impossible to know what was on there to start with, or what there is now.

FWIW if noise only in "highest gear" (presumably big/little) my guess would be limit screw needs to be backed off slightly, either front or rear depending on where the noise is coming from, which we're not privy to.

 

[Ajax Bay]

Google confirms ....
Some road bikes will come equipped with a front derailleur that has a “trim” feature. The trim allows you to make small adjustments to the front derailleur that will eliminate chain rub, but not cause a full shift into another chain ring.
Allows minute adjustment of the front changer to stop chain rub.

This is bo11ocks @Sharky . Why do you think Google knows better than 'us'?
An FD does not control its movement "make small adjustments", the limit screws do what they're meant to (and this is the most likely tweak for the as yet unreturned OP). Clearly many FD shifters have a 'trim feature'.
I too would need to know what the OP means by "trim shifters" in an FD context obv. And along @roubaixtuesday 's enquiry line.

 

[lydiaald]

Before we answer, prove that you are still watching the thread.

Yes we were away this weekend which is why there is a delay in me answering. We sent the bike to an independent bike mechanic who fitted the Shimano Tiagra Sl-4700 shifter. The original ones couldn’t be set as it was cross chaining. The trim shifters allow for minor adjustments. We did originally take the bike back to the retailer but this was Halfords and they couldn’t sort it and tried to tell us the noise was coming from the bottom bracket!

 

[Ajax Bay]

fitted the Shimano Tiagra SL-4700 shifter. The original ones couldn’t be set as it was cross chaining.

Front Derailleur: Shimano Tiagra FD-4700
Replacement LH shifter: https://bike.shimano.com/products/components/pdp.P-SL-4700.html
Compatibility:
The SL-4700 2x10 speed shifter set is compatible with Shimano Tiagra FD-4700 2X10 speed front derailleur
"Shimano SL-4700 Tiagra (flat handle) 2x front shifter has 4 positions:

• High
• High trimmed
• Low trimmed
• Low"

Shifter replaced was (best guess) Shimano Deore 2x10 (SL-M5100-L)
Assume this: https://bike.shimano.com/products/components/pdp.P-SL-M5100-L.html

Looks to me that the shifter fitted was not said to be compatible with the FD-4700 fitted (as sold by Halfords).
For flat bars the only option shown is "SL-": the "STs" are all for drop bars.

Replacing as you've done seems correct, but expensive given Halfords sold you a set up Shimano doesn't offer as compatible.

 

[Yellow Saddle]

Yes we were away this weekend which is why there is a delay in me answering. We sent the bike to an independent bike mechanic who fitted the Shimano Tiagra Sl-4700 shifter. The original ones couldn’t be set as it was cross chaining. The trim shifters allow for minor adjustments. We did originally take the bike back to the retailer but this was Halfords and they couldn’t sort it and tried to tell us the noise was coming from the bottom bracket!

Thanks for coming back.

The original ones couldn’t be set as it was cross chaining.

.
I don't understand this statement of yours. Cross-chaining is something YOU do to the drivetrain, not a defect of sorts. Cross-chaining is when you are in the big gear in front and small at the back, or vice versa. All bikes can be forced to cross-chain.

A bunch of stuff was said about "trim shifters". Just for clarity, a trim feature can only be built into a shifter, not into a FD. FDs have infinite positions between its two limits and it is the shifter that decides where it is positioned. Your use of trim shifters is correct.

In order to figure out where the noise comes from when the chain is turning whilst in high gear, you need to look plumb down the chain into the FD cage and confirm whether or not the chain makes contact with either side of the cage. The cage (FD) can be moved away from the chain by either playing with the cable tension (if the limit screws allow it) or, turning the limit screws out a little bit so that the cable can make use of the newly-created space.

We can go on and speculate a bunch of other scenarios, but without you identifying where the noise comes from, we can only guess.

 

[lydiaald]

Yes the trim shifters have been a huge help and sorted most of the issues. These were recommended and put on by a bike specialist.

The noise is coming from the front drailure. Since having the shifter fitted he has managed to get all the gears working but when it’s in the highest gear the chain has a slight tapping sound when pressure is applied to the pedals? Is this all down to the screws or Is there another issue that could be causing it?

 

[lydiaald]

Yes the trim shifters have been a huge help and sorted most of the issues. These were recommended and put on by a bike specialist.

The noise is coming from the front drailure. Since having the shifter fitted he has managed to get all the gears working but when it’s in the highest gear the chain has a slight tapping sound when pressure is applied to the pedals? Is this all down to the screws or Is there another issue that could be causing it?

Yes the trim shifters have been a huge help and sorted most of the issues. These were recommended and put on by a bike specialist.

The noise is coming from the front drailure. Since having the shifter fitted he has managed to get all the gears working but when it’s in the highest gear the chain has a slight tapping sound when pressure is applied to the pedals? Is this all down to the screws or Is there another issue that could be causing it?

 

[lydiaald]

We changed the shifters to the trim ones but only the left could be changed as the right isn’t compatible with the rear deore drailure due to having a different cable pull ratio.