SPCX drivetrain Kit – 4 bolt

Kit
SPCX drivetrain kit - 4 bolt

SPCX drivetrain Kit – 4 bolt

164,75€ incl. VAT

BMX CHILDREN’S PARTS

For   tracks – no european

Our SPCX 4-bolt drivetrain kit gives saves at least 2,4% on lap times and ease of learning.

    • Delivery times for pre-orders : 5/6 weeks
  • Select your options:
    • Set composed of :
SPCE BMX Chain - BMX Race Drivetrain - AllYoogs
SPCE BMX Chain

In stock (can be backordered)

Original price was: 45,83€.Current price is: 44,42€.
SPCX chainring - 4-bolt - BMX drivetrain - AllYoogs
SPCX BMX 4-bolt chainring
Original price was: 62,49€.Current price is: 60,57€.
SPCX cog- BMX drivetrain - AllYoogs
SPCX BMX cog
Original price was: 33,33€.Current price is: 32,30€.

In stock (can be backordered)

SKU: BDSPCX001EN Categories: , , , Tags: , Brand:

Description

The SPCX 4-bolt drivetrain kit is a definite advantage for young riders. In fact, our SPCX 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…

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 SPCX sprocket and improve your rider’s performance.

  • Our SPCX 4-bolt chain kit can be fitted to BMX bikes up to frame size “EXPERT XL”
  • From the “PRO” frame, our children’s kit continues with the SPCE kit.
  • The SPCE chain is only compatible with SPCX and SPCE race parts.
  • Our chain breaker is specific and the only compatible one on the market to lengthen or shorten the SPCE chain.
  • Patent Pending
  • Designed and developed by AllYoogs. Made in France


Our SPCX drivetrain kit fits all BMX frames except the following brands : Meybo HSX, Supercross Vision F1 and RSX, GT, 4NIX and the Meybo instant-engagement hubs.

💡For more details on our drivetrain 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.

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The SPCX 4-bolt chainring

– The special shape of the SPCX chainring 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.

The SPCX cog

– The special machining of our SPCX cog at the spline level makes it lighter while maintaining a significant power transmission capacity. Compatible with all cassette type freewheel bodies.
      • Type : cog for Single-speed cassette (single speed)
      • Size : 28 to 32 teeth
      • Weight : 10 to 15 g
      Choose your SPCX cog

– 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.

How to choose your SPCX 4-bolt chain kit :

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

  2. 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 chainring and the cog of your child.

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

CLASSIC FRONT SPROCKET 4-bolt 104 mm – 20 x 1.1/8 TYRE
REAR SPROCKET323334353637
38
39404142434445
18289,3298,3307,4316,4325,5334,5343,6352,6361,6370,7379,7388,8397,8 406,8
17306,3315,9325,5335,0344,6354,2363,8373,3382,9
392,5402,0411,6421,2 430,8
16325,5335,6345,8356,0
366,2376,3386,5396,7406,8417,0427,2437,3447,5457,7
15347,2358,0368,9379,7390,6401,4412,3423,1434,0444,8455,7

To obtain the SPCX equivalence :

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

Example with 376,3: the closest values are 376,3 and 378,0. So the choice is a 31 cog with a 72 chainring.

AllYoogsSPCX FRONT SPROCKET 4-bolt 104mm – 20 x 1.1/8 TYRE
SPCX REAR SPROCKET71727374757677
32361,1366,2371,2376,3381,4386,5391,6
31372,7378,0383,2388,5393,7399,0404,2
30385,1390,6396,0401,4406,8412,3417,7
29398,4404,0409,6415,3420,9426,5432,1
28412,6418,5424,3430,1435,9441,7447,5

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

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

Example: cog = 16 and chainring = 40. The value to take into account = 421,0

CLASSIC FRONT SPROCKET 4-bolt 104 mm – 20 x 1.3/8 TYRE
REAR SPROCKET323334353637
38
39404142434445
18299,4308.7318.1327.4336.8346.1355.5364.8374.2383.6392.9402.3411.6421,0
17317.0326.9336.8346.7356.6366.5376.4386.3396.2406.1416.0425.9435.8445,7
16336.8347.3357.8368.4378.9389.4399.9410.4421.0431.5442.0452,5463,1473,6
15359.2370.5381.7392.9404.1415.4426.6437.8449,0460,3471,5

To obtain the SPCX equivalence :

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

Example with 421,0: the closest values are 421,0 and 423,9. So the choice is a 29 cog with a 73 chainring.

AllYoogsSPCX FRONT SPROCKET 4-bolt 104mm – 20 x 1.3/8 TYRE
SPCX REAR SPROCKET71727374757677
32373,6378,9384,1389,4394,7399,9405,2
31385,7391,1396,5402,0407,4412,8418,3
30398,5404,1409,7415,4421,0426,6432,2
29412,3418,1423,9429,7435,5441,3447,1
28427,0433,0439,0445,0451,0457,1463,1

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

Additional information

Weight 0,100 kg
Dimensions 27 × 27 × 2 cm
Size

70 teeth, 71 teeth, 72 teeth, 73 teeth, 74 teeth, 76 teeth, 77 teeth, 78 teeth, 75 teeth
Size

28 teeth, 30 teeth, 32 teeth

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