Name: SPCK 4-bolt drivetrain kit + tools + chain tensioner
Brand: AllYoogs
SKU: BDSPCK007EN
Price: 300.00 EUR
Availability: InStock

Kit

SPCK 4-bolt drivetrain kit + tools + chain tensioner

359,99€ incl. VAT

Our pack, SPCK 4-bolt drivetrain kit + tools + chain tensioner for BMX Race, gives a minimum 2,4% gain in lap times and makes learning easier.

Choose your SPCK front and rear sprockets

Select your options:
- Kit composed of :

SPCK BMX chain for kids - BMX Race - AllYoogs

1 × SPCK BMX Chain

In stock (can be backordered)

SPCK 4-bolt front sprocket – Kids BMX Race drivetrain - AllYoogs

1 × SPCK BMX 4-bolt front sprocket

SPCK Rear sprocket - BMX Race - AllYoogs

1 × SPCK BMX Rear Sprocket

SPCK chain tensioner - 3/4 front view - BMX Race - AllYoogs

1 × SPCK chain tensioner

SPCK Chain breaker / Riveting tool – AllYoogs®

1 × SPCK Chain breaker / Riveting tool

In stock (can be backordered)

1 × SPCK Freewheel chain whip / Bottom bracket tool

In stock (can be backordered)

SKU: BDSPCK007EN Categories: BMX Race, BMX Race Parts, BMX drivetrain kit, SPCK BMX Drivetrain Tags: SPCK BMX Drivetrain, SPCK range Brand: AllYoogs

Description
Additional information

Description

SPCK 4-bolt drivetrain kit + tools + chain tensioner

Benefits of the SPCK 4-bolt drivetrain kit + tools + chain tensioner

The SPCK 4-bolt drivetrain kit + tools + chain tensioner pack is a definite advantage for young riders. In fact, our SPCK drivetrain gives a measured gain of between 2,4 and 2.8% on lap times, and makes it easier to learn how to “start”, manuals… It’s currently the lightest on the market.

We offer a wide range of sizes suitable for children. That’s why we recommend you take a look at our comparison chart to choose the right SPCK sprocket and improve your rider’s performance.

Our SPCK 4-bolt chain kit can be fitted to BMX bikes up to frame size “EXPERT” (weight limit 45kg = 99lb).
Thanks to the SPCK chain tensioner, it is possible to push the limits of our kit up to “PRO” frames (weight limit 50kg = 110lb).
Our SPCK chain breaker is specific and the only compatible one on the market to lengthen or shorten the SPCK chain.
The SPCK chain kit is only compatible with SPCK race parts.
Patent Pending
Designed and developed by AllYoogs. Made in France

For more details on our chain kit concept, we recommend reading our article.
If you need more information on installation and maintenance BMX chain kit, you’ll find answers to your questions in our FAQ.

⚠️ Compatibility: * Our SPCK drivetrain kit fits all BMX frames except for the following brands: Meybo HSX and Meybo hubs with instant engagement.

Join the AllYoogs community: follow us on social media and discover all our BMX Race innovations

The SPCK 4-bolt front sprocket

– The special shape of the SPCK front sprocket with 4 fixing bolts is the result of optimisation using Finite Element Method (FEM) simulation. As a result, it increases resistance and significantly reduces weight.

- - Center distance: 104 mm – 4 bolt
  - Size : 67 to 73 teeth
  - Weight : 31 g to 35 g according to the number of teeth
  Choose your SPCK front sprocket

The SPCK rear sprocket

– The special machining of our SPCK rear sprocket at the spline level makes it lighter while maintaining a significant power transmission capacity. Compatible with all cassette type freewheel bodies.

- - Type : rear sprocket for Single-speed cassette (single speed)
  - Size : 28 to 34 teeth
  - Weight : 10 to 15 g depending on the number of teeth
  Choose your SPCK rear sprocket

– AllYoogs front and rear sprockets are machined by CNC in France from 7075 aluminium (more resistant than 6061 aluminium). This material guarantees lightness and above all a very high resistance of the product thanks to the hard anodising that gives it a golden appearance. This treatment ensures a longer life for our products.

The SPCK chain tensioner

Our SPCK chain tensioner fits on most BMX race frames to ensure constant chain tension, solving the recurring problems riders have had for years. Our product is discreet, compact and designed for single speed.

Benefits of the SPCK AllYoogs chain tensioner :

Change the front sprocket in a few minutes, without stress!
Tension the chain without moving the rear wheel.
The chain is adjusted manually, without tools.
The original tensioners simply adjust the rear wheel position and do not interfere with the chain tension.
The tensioner sprocket pushes the chain up or pulls it down (push/pull), increasing the adjustment range and load capacity of the SPCK chain kit with 28 and 27-teeth rear sprockets. Thanks to the tensioner, it will be possible to use our children’s drivetrain up to PRO frames.
Quick change of the front sprocket from 4 to 6 teeth (+2 and -2 minimum).
The large size of the bearing reduces its rotational speed, which considerably increases its life and load capacity. It’s diameter also limits vibrations.
Available in 10 mm bolts and 15 and 20 mm axles
The lightest bmx tensioner on the market : 94g in 10″ bolt.
Tensioner sprocket in anti-friction and silent technical plastic.
The bracket fits between the frame and the wheel.
Completely stainless.
Easy to maintain and remove.

Questions about fitting our SPCK chain tensioner? Have a look at our FAQ!

* Our chain tensioner fits all BMX frames except the following brands: Prophecy Scud Evo3, Meybo HSX, GT, 4NIX, Staystrong V5 and the Meybo instant-engagement hubs.

Our SPCK 4-bolt drivetrain kit + tools + SPCK chain tensioner is a complete package.

How to choose your SPCK 4-bolt drivetrain kit ?

Development calculated in mm with a 20 x 1.1/8 tyre
Development calculated in mm with a 20 x 1.3/8 tyre

1. Development calculated in mm with a 20 x 1.1/8 tyre

In the table below, find the value indicated at the intersection of the front sprocket and the cog of your child.

Example: cog = 16 and front sprocket = 37. The value to take into account = 376,3

	CLASSIC FRONT SPROCKET 4-bolt 104 mm – 20 x 1.1/8 TYRE
REAR SPROCKET	32	33	34	35	36	37	38	39	40	41	42	43	44	45
18	289,3	298,3	307,4	316,4	325,5	334,5	343,6	352,6	361,6	370,7	379,7	388,8	397,8	406,8
17	306,3	315,9	325,5	335,0	344,6	354,2	363,8	373,3	382,9	392,5	402,0	411,6	421,2	430,8
16	325,5	335,6	345,8	356,0	366,2	376,3	386,5	396,7	406,8	417,0	427,2	437,3	447,5	457,7
15	347,2	358,0	368,9	379,7	390,6	401,4	412,3	423,1	434,0	444,8	455,7

To obtain the SPCK equivalence :

In the table, find the values closest to those in the table above (higher values). The value to be taken into account is the one with the smallest cog.

Example with 376,3: the closest values are 378 and 379,7. The smallest cog is 30, so the choice is a 30 cog with a 70 front sprocket.

AllYoogs	SPCK FRONT SPROCKET 4-bolt 104mm – 20 x 1.1/8 TYRE
SPCK REAR SPROCKET	67	68	69	70	71	72	73
34	320,7	325,5	330,3	335,0	339,8	344,6	349,4
33	330,4	335,3	340,3	345,2	350,1	355,1	360,0
32	340,7	345,8	350,9	356,0	361,1	366,2	371,2
31	351,7	357,0	362,2	367,5	372,7	378,0	383,2
30	363,4	368,9	374,3	379,7	385,1	390,6	396,0
29	376,0	381,6	387,2	392,8	398,4	404,0	409,6
28	389,4	395,2	401,0	406,8	412,6	418,5	424,3

2. Development calculated in mm wtih a 20 x 1.3/8 tyre

In the table below, find the value indicated at the intersection of the front sprocket and the cog of your child.

Example: rear sprocket = 16 and front sprocket = 40. The value to take into account = 421

	CLASSIC FRONT SPROCKET 4-bolt 104 mm – 20 x 1.3/8 TYRE
REAR SPROCKET	32	33	34	35	36	37	38	39	40	41	42	43	44	45
18	299,4	308.7	318.1	327.4	336.8	346.1	355.5	364.8	374.2	383.6	392.9	402.3	411.6	421,0
17	317.0	326.9	336.8	346.7	356.6	366.5	376.4	386.3	396.2	406.1	416.0	425.9	435.8	445,7
16	336.8	347.3	357.8	368.4	378.9	389.4	399.9	410.4	421.0	431.5	442.0	452,5	463,1	473,6
15	359.2	370.5	381.7	392.9	404.1	415.4	426.6	437.8	449,0	460,3	471,5

To obtain the SPCK equivalence :

In the table, find the values closest to those in the table above (higher values). The value to be taken into account is the one with the smallest cog.

Example with 421: the closest values are 423,9 and 424,1. The smallest cog is 27, so the choice is a 27 SPCK stainless steel cog with a 68 front sprocket.

AllYoogs	SPCK FRONT SPROCKET 4-bolt 104mm – 20 x 1.3/8 TYRE
SPCK REAR SPROCKET	67	68	69	70	71	72	73
34	331.8	336.8	341.7	346.7	351.6	356.6	361.5
33	341.9	347.0	352.1	357.2	362.3	367.4	372.5
32	352.6	357.8	363.1	368.4	373.6	378.9	384.1
31	363.9	369.4	374.8	380.2	385.7	391.1	396.5
30	376.1	381.7	387.3	392.9	398.5	404.1	409.7
29	389.0	394.8	400.7	406.5	412.3	418.1	423.9
28	402.9	408.9	415.0	421.0	427.0	433.0	439.0

Depending on your child’s characteristics (starting difficulties, saturation…), we can be even more precise in the choice of our SPCK 4-bolt drivetrain kit + tools + chain tensioner. Don’t hesitate to contact us by phone or whatsapp, we are here to help you!