19 Tooth Gearbox Sprocket

(126 customer reviews)

£15.99

TEC 19 tooth gearbox drive sprocket

This will drop revs and also save you fuel

“Like having a 6th gear”

If you are sick of looking for top gear when you are already there then this is for you.

We have both 520 and 525 size sprockets for the corresponding length chain.

BE SURE TO SELECT THE CORRECT SIZE SPROCKET ON THE DROP DOWN MENU ON THIS PAGE

Triumph models from 2000 up to 2012 are 525 chain size. Triumph changed the chain size to 520 on some bikes for the 2012 model year, so if ordering for a bike from this year or beyond, check the chain size.

You can check your chain sizes on the side links of the chain it will have either 520 or 525 stamped on it.

This part will ONLY fit air-cooled Triumph Twin models.  It will not fit any water-cooled models.

NOTE – On some rare occasions, the sprocket may be slightly loose.  If so, re-use the original washer and add another tab locking washer on top of the sprocket.

Rating
3.7 out of 5
Based on 126 Reviews
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Jack M.
October 10, 2025

19 Tooth Gearbox Sprocket

Graeme C.
September 1, 2025

Excellent service

Thanks TEC excellent service and quality parts as always. You are my go to supplier for my air cooled triumph bonne.

Phillip N.
August 14, 2025

19T sprocket

Before you do anything else to your bike buy this sprocket! It's a total game changer, wish I'd done it sooner. Usual excellent quality from TEC, took no time to fit and delivery in 24hrs. Outstanding service from this company

scott B.
August 11, 2025

19t sprocket

Perfect, good response with postage.

Anthony P.
July 28, 2025

19T Triumph Sprocket

Good item and quick delivery.

Suki B.
July 24, 2025

Excellent

Thanks for a excellent service 😉

garry R.
July 5, 2025

Uprated sprocket

Fast and competent service

David T.
June 29, 2025

Gearbox final drive sprocket

What a great mod ! Doesn't drop revs by a lot, but it just feels so much better,so right ! As previous reviews have said, it stops you reaching for sixth gear as much. I still do it, but nowhere near as much. Thank you

Kevin B.
May 19, 2025

Sixth gear

Received this item quickly looks nice bit of kit not fitted yet but looking at other reviews,thinking this is just what my triumph needs to stop keep looking for sixth gear

Harry G.
November 25, 2024

Front Sprocket

Fast delivery and well packed. Looks good quality but not had chance to fit them yet.

darren B.
October 18, 2024

Quick delivery , sprocket fits perfectly thanks

gregory H.
October 4, 2024

Suits my riding style

I’m very pleased I fitted the 19t sprocket because it drops the revs at cruising speeds just enough to stop looking for a 6th gear. Riding around the country side is more pleasant too as I can hold what ever gear I’m in longer. My bike had a Dunstall exhaust and stage 1 tune so acceleration has not seemingly changed much from standard. The sprocket is well made and seems good quality. Very fast delivery from TEC too.

Laszlo B.
September 2, 2024

19T

Great piece..top delivery! EU Customs suck..

Dan W.
June 29, 2024

Good service

As described!!!

Ezra S.
June 28, 2024

Small Part, BIG difference

Customer service is amazing and professional. Part arrived in South Africa very quickly. WHAT a difference in ride quality! Stuck with a rear 43T and my 2004 Bonneville T100 is now a super smooth ride. First thing that stuck out was how comfortably I can now go in 1st gear to 60km/h at 4500rpm and riding on the highway is an absolute pleasure :) mechanic that helped me with installation commented it's the best looking aftermarket sprocket he's seen for a Triumph and it fit perfectly. Very happy :D

Gary B.
June 9, 2024

Well made

simple job , done in 20 minutes , transformed the bike , the sprocket is well made , well worth doing.

Gary B.
May 30, 2024

Sprocket

Easy to order quick delivery

Robbie S.
May 12, 2024

19 tooth sprocket

Arrived on time and in good order and fits perfectly

Athanasios T.
May 10, 2024

About a product that wasn't send

I ordered a 19 tooth gearbox sprocket for my Bonneville SE 2010 Just a minute I received a message from my local mail service that my package is on delivery So I want to thank you for your service and the other feedback I send half an hour ago is false eventually

paul V.
April 16, 2024

Sprocket

excellent service as always. Highly recommended supplier

Craig C.
March 30, 2024

Magnificent

Great sprocket and fast delivery. Speedmaster 2013 now cruises like a dream!

HIRINI S.
February 9, 2024

19 Tooth Gearbox Sprocket

Nicholas B.
December 4, 2023

Bonnie bits pt3

Prompt delivery and well packed. The item looks good although I will be fitting over the upcoming festive break. Thank you.

Hamish K.
November 19, 2023

19 tooth gearbox sprocket

Quick delivery, well packaged and feels well made too, not yet fitted the part so I can’t comment further.

Derrell C.
October 19, 2023

Triumph part

I found the right part easily on Tec website. Ordering was easy and the price was good.

martin B.
October 17, 2023

Arrived promptly. Easy to fit, reduces 70mph cruising revs from 4,250 down to 4000. Not a 6th gear, but noticeable.

Paul R.
October 12, 2023

19 tooth gearbox sprocket

Brilliant.really pleased.

Leslie S.
August 2, 2023

19T Sproket Change

Delivered very quickly, took me around 60 mins to fit, not sure how it takes some poeple 15 mins to fit (took me atleast 10 mins to drink my cuppa while fitting it) I own a 2009 EFI 900 Thruxton and I did not see 600 rpm drop at 60 MPH more like 250 RPM but does seem to be a good upgrade I have only ridden the bike once since I did the sprocket change so guess time will tell Note: 36mm Nut is torqued at 98 FT LB so can be difficult to undo, I also removed the Chain Guard for access

mark O.
July 2, 2023

Thanks TEC

Received my 19 tooth sprocket Best mod I’ve done thanks TEC

george M.
June 25, 2023

Great company

Item was delivered quickly and was a quality item

john C.
June 24, 2023

Looks good

Haven’t tried it yet But looks good

Gary O.
June 22, 2023

Great value

Another great value part . Thank you

Steve T.
June 13, 2023

19 tooth sprocket for air cooled Bonneville

Good job, it has made such a difference to the revs on my bike, I do not notice any difference at the lower end looking forward to saving fuel extending the range of the bike.

bård J.
April 8, 2023

19 Tooth Gearbox Sprocket

Ian A.
December 10, 2022

A perfect fit

Stephen W.
October 11, 2022

19 tooth gearbox sprocket

Came quickly, easy to do, my bonneville isn’t revving like a nutter as much when ringing its neck! 🤣

Stephen A.
October 5, 2022

Good service.

As usual the product is good quality and the service excellent the go too guys for triumph and Enfield.

David B.
September 22, 2022

19 tooth sprocket for triumph t100

Excellent service and product again

Derek O.
September 2, 2022

Not the first part from TEC . Same stranded of Service five star 👍

Pete W.
August 17, 2022

19 tooth gearbox sprocket

Great mod why didn't triumph do this from standard.

Andy B.
August 11, 2022

19 toothed sprocket

Great quality Excellent service Many thanks

Jeremy L.
August 10, 2022

19 tooth sprocket

excellent improvement

Paul C.
August 9, 2022

it’ll be great like all TEC bike parts.

I’m sure it’ll be great like all TEC bike parts, won’t be fitted until next service.

neil A.
August 3, 2022

19t front sprocket

This is the best modification for and 865 air cooled engine . Stops you hunting for a fifth gear at highway speeds . Also if you have the electronic speedo I have found that now the speedo reads true with a 19t sprocket .

David S.
June 25, 2022

19 tooth gearbox sprocket

Good quality , drops revs about 500 revs at 60mph well worth the money

John M.
May 19, 2022

Should have been OEM

An easy job (providing you have a 36mm socket and a torque wrench) which took about 15 mins in total. Good quality part - you'd expect nothing less from Tec. Gearing is now spot-on. Quite why they didn't come from the factory with a 19/43 setup is beyond me. Cruising is much more comfortable and performance is unaltered.

Martin S.
November 5, 2021

Front sprocket

This is the second one I have had They make a big difference to the bike Great service and product as always

Review Image
Rohan P.
October 19, 2021

19 Tooth sprocket

Item was delivered very quickly

Luke N.
October 12, 2021

Fast delivery

Good fast delivery and good solid sprocket. Haven’t yet fitted.

Bob
September 19, 2021

19t Bonneville sprocket

As usual great quality and service from tecbike. Straightforward to fit ( You need a 36mm socket ) This really makes a difference to cruising at 60 mph . Now feels like the bike has another gear would recommend .

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