15 Tooth Upgrade Sprocket – Scrambler 400 X

(34 customer reviews)

£14.00

  • Improved Performance:
    • Optimizes bike performance for road use
    • Reduces engine revs and vibration at cruising speeds
    • Provides better gear spacing for smoother rides
    • fitted with noise reduction rubber cush ring as OE sprockets.
  • Compatibility:
    • This sprocket comes as standard on Speed 400 models
    • Recommended upgrade for Scrambler 400 X, which comes with a 14-tooth sprocket
  • Benefits:
    • Increases road speed efficiency
    • No impact on speedometer accuracy
    • No issues with ABS or traction control systems

This sprocket will fit with the standard chain and give you more adjustment range.

We have rigorously tested this 15 tooth sprocket on our development bike, and the results are impressive. The bike performs significantly better at higher speeds, making your rides more enjoyable and comfortable.

For riders who spend most of their time on the road, this sprocket change is a must-do modification. Enjoy the benefits of improved performance and smoother rides without breaking the bank. Make the smart choice and upgrade to the 15 tooth sprocket for a superior riding experience.

In stock

Quantity:
Rating
5.0 out of 5
Based on 34 Reviews
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Michael
June 4, 2026

Not fitted yet but happy with the price and service.

Brian G.
September 23, 2025

400x sproket

Received in good order on time via royal mail however not fitted yet will send further when fitted and used. Regards.

Roy P.
September 11, 2025

15 tooth sprocket upgrade

Excellent service, thank you

stuart Y.
August 16, 2025

15 Tooth Sprocket

Well worth doing makes a noticeable difference to your ride.

Juergen R.
August 10, 2025

Triumph Scrambler 400 X 15 tooth sprocket

Sprocket is great quality and fits well. Driving is much better with the gear ratio, 1st gear is usable now

David P.
July 28, 2025

Better for everyday riding

Replacement drive sprocket much more suitable for everyday riding. Another useful product from TBP and speedy delivery. You Tube videos helpful but don’t specify torque setting for rear wheel spindle which is 98Nm in the small print of the on line owners booklet.

Mark M.
July 24, 2025

15 tooth sprocket for 400x

Pretty easy to fit. Makes the gearing so much smoother.

Clive S.
July 23, 2025

15 tooth sprocket

Looks good but will not be fitted until after the bike's first service.

David R.
July 21, 2025

15T sprocket for Triumph 400X

Had read up on this upgrade, and glad i did it. Wanted the rubber bushed version, found it here, quick order and delivery. It was a little tricky to fit on, but all good. Took about 40 mins.

Graeme O.
July 10, 2025

15 Tooth sprocket Triumph Scrambler 400X 2025

Bike is smoother with this upgrade Easy to swop from 14 to 15 sprocket

John S.
July 3, 2025

Good

This sprocket makes the scramble a much better bike, highly recommend one.

David C.
June 14, 2025

Triumph scrambler 400x 15 tooth sprocket

15 tooth front sprocket for triumph scrambler, not yet fitted but looks good quality. So can’t comment on ride difference as of yet. Received in good time would buy from tec bikes again.

John H.
May 22, 2025

Useful modification

Easy to do, calms the engine revs down. Top gear does become an ‘overdrive’ gear probably most use on m-ways.

Rob S.
April 29, 2025

Upgrade

What a difference to the bike, a must for anyone with the 400x , great price from TEC and fast delivery.

Ian H.
April 12, 2025

15 tooth sprocket Triumph Scrambler 400x

For the price, easily the best upgrade to the 400x. First gear is now usable and cruising at 100 kph now more comfortable. Going thru the gearbox feels like it was designed for this sprocket.

allan W.
February 14, 2025

Triumph 400 x sprocket

Excellent product and good overseas tracking on delivery👍

Steve B.
February 3, 2025

Delivery excellent

Delivery and communication excellent product looks good , but not fitted yet

Andrew B.
January 15, 2025

So worth it

Thank you TEC for the very efficient service. I'm in New Zealand and the products arrived in a timely fashion and packaged safely. The 15 tooth sprocket has massively improved 1st, 2nd, 3rd and 4th gear on the Scrambler!

David J.
December 19, 2024

Super service

Great quality, easy to deal with and quick delivery. Thanks.

Derry Y.
December 8, 2024

Goods as described and well packaged

Great service would use again

Ernest D.
November 21, 2024

400x 15 tooth upgrade

Exalent service front tec quality part turned a good bike into a better one

gary M.
November 21, 2024

400x front sprocket

I have bought a few items from tec parts for triumph 400x all parts are well made and fit well including the 15 tooth front sprocket

Guy W.
November 18, 2024

15 Tooth Upgrade Sprocket - Scrambler 400 X

Robert T.
November 18, 2024

Sprocket

Good product and fast delivery

Chris B.
November 11, 2024

Excellent service

Straight forward order process, prompt delivery. Quality comparable to O/E part. The sprocket change makes riding more relaxed, greater range in each gear. Engine still well with in its performance envelope. A worth while modification.

Keith B.
November 8, 2024

15 tooth upgrade

New sprocket arrived quickly as promised. Now fitted and i think there is a definite improvement over the standard Scrambler gearing, if you are using your bike for predominately road riding. Fitting was straightforward, maybe slightly fiddly to get the old gear off the shaft and the new one on once the drive nut and lock washer have been removed and wiring moved aside, but hardly a major problem. Triumph do not give a torque figure for the main drive nut, but I found a setting of 85Nm online and used this, plus replacing the lock washer of course. Several hundred miles since the job and no problems. Good price for this sprocket from TEC, so I have no regrets.

Martin S.
November 3, 2024

Triumph 400x 15 front sprocket

The sprocket arrived in good time and well packaged, it is good quality and fitted perfect,

Alex R.
October 21, 2024

Triumph 400x - 15 tooth

Fitted this to my previously mediocre bike. Now it's simply fantastic. Thank you.

Peter K.
October 10, 2024

15 tooth sprocket

Perfect fit and a nice improvement to the bike great service, a pleasure to deal with

Doug F.
September 20, 2024

Triumph Scrambler 400 X

Straight swop of original 14 tooth front sprocket for 15 tooth. Good communication and fast delivery.

Tracey P.
September 18, 2024

Good service

Arrived quickly. No problems ordering. Very good

Ian C.
September 6, 2024

Great product and service.

I purchased a couple of items from Tec after looking around at a few suppliers. Fortunately, I chose the Tec parts. Service was excellent, fast shipment and delivery, and the parts fitted perfectly. I’d recommend them to anyone.

kelvin C.
August 29, 2024

One tooth

That extra tooth makes a difference/ longer first second gears / not much but excellent for tarmac roads /and less rev's thanks for excellent service and products.

Harry S.
August 18, 2024

15 Tooth Upgrade Sprocket - Scrambler 400 X

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