SPCK BMX Rear Sprocket

SPCK Rear sprocket - BMX Race - AllYoogs

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SPCK BMX Rear Sprocket

33,33€

BMX CHILDREN’S PARTS – tracks

The SPCK rear sprocket is super light for your young riders.

    • Type : rear sprocket for Single-speed cassette
    • Size : 28 to 34 teeth
    • Weight : 10 to 15 g
    • Colour : golden
    • Material : 7075 aluminium
    • Surface treatment: hard anodised

Choose your SPCK rear sprocket

SKU: BPDRSPCK000EN Categories: , , , Tags: , Brand:

Description

How to Choose Your SPCK Sprocket

First of all, thanks to its optimized design, the SPCK BMX rear sprocket by AllYoogs reduces weight without compromising performance. Moreover, it is compatible with all cassette-type freewheel bodies. Its CNC machining, carried out in France, ensures exceptional quality and increased durability.

A Chain Kit Designed for Performance

The SPCK chain kit is a real asset for young riders. Its innovative drivetrain delivers a minimum measured time gain of 2.4 to 2.8%, while making it easier to learn starts, manuals, and other essential techniques. It is currently the lightest on the market.

Compatibility & Technical Limits

  • Our SPCK BMX rear sprocket 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).
  • The SPCK chain kit is only compatible with SPCK race parts.
  • Patent Pending
  • Designed and developed by AllYoogs. Made in France

Choose the Ideal Configuration

Finally, we offer a wide range of sprocket sizes adapted for children, allowing them to optimize their performance on the track. To go further, consult our development charts to select the ideal SPCK sprocket.

Choose your SPCK rear sprocket

💡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.

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How to choose your SPCK BMX rear sprocket ?

With a 4-bolt front sprocket

  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

  • With a 5-bolt front sprocket

  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

With a 4-bolt front sprocket

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 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 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 with a 70 front sprocket.

AllYoogsSPCK FRONT SPROCKET 4-bolt 104mm – 20 x 1.1/8 TYRE
SPCK REAR SPROCKET67686970717273
34320,7325,5330,3335,0339,8344,6349,4
33330,4335,3340,3345,2350,1355,1360,0
32340,7345,8350,9356,0361,1366,2371,2
31351,7357,0362,2
367,5372,7
378,0383,2
30363,4368,9374,3
379,7385,1390,6396,0
29376,0381,6387,2
392,8398,4404,0409,6
28389,4395,2401,0406,8412,6418,5424,3
27403,8409,8415,9421,9427,9434,0440,0

 
 
 
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 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 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 with a 68 front sprocket.

AllYoogsSPCK FRONT SPROCKET 4-bolt 104mm – 20 x 1.3/8 TYRE
SPCK REAR SPROCKET67686970717273
34331.8336.8341.7346.7351.6356.6361.5
33341.9347.0352.1357.2362.3367.4372.5
32352.6357.8363.1368.4373.6378.9384.1
31363.9369.4374.8380.2385.7391.1396.5
30376.1381.7387.3392.9398.5404.1409.7
29389.0394.8400.7406.5412.3418.1423.9
28402.9408.9415.0421.0427.0433.0439.0
27417,9424,1430,3436,6442,8449,0455,3

With a 5-bolt front sprocket

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 your child’s cog.

Example: rear sprocket = 17 and front sprocket = 40. The value to take into account = 382,9

CLASSIC FRONT SPROCKET 5-bolt 110 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 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 382,9 : the closest values are : 383,2 and 385,1. The smallest cog is 30, with a 71 front sprocket.

AllYoogsSPCK FRONT SPROCKET 5-bolt 110mm – 20 x 1.1/8 TYRE
SPCK REAR SPROCKET70717273
35325.5330.1334.8339.4
34335.0339.8344.6349.4
33345.2350.1355.1360.0
32356.0361.1366.2371.2
31367.5372.7378.0
383.2
30379.7385.1390.6
396.0
29392.8398.4404.0
409.6
28406.8412.6418.5424.3
27421,9427,9434,0440,0

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 your child’s front sprocket and cog.

Example : cog = 18 and front sprocket = 41. The value to take into account = 383,6

CLASSIC FRONT SPROCKET 5-bolt 110 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 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 gear.

Example with 383,6 : the closest values are : 384,1 and 385,7. The smallest rear sprocket is 31 with a 71 front sprocket.

AllYoogsSPCK REAR SPROCKET 5-bolt 110 mm – 20 x 1.3/8 TYRE
REAR SPROCKET70717273
35336.8341.6346.4351.2
34346.7351.6356.6361.5
33357.2362.3367.4372.5
32368.4373.6378.9384.1
31380.2385.7391.1396.5
30392.9398.5404.1409.7
29406.5412.3418.1423.9
28421.0427.0433.0439.0
27436,6442,8449,0455,3

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

Additional information

Weight 0,030 kg
Dimensions 27 × 20 × 1 cm
Size

28 teeth, 29 teeth, 30 teeth, 31 teeth, 32 teeth, 33 teeth, 34 teeth

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