SPCE BMX front sprocket

SPCE chainring - 4-bolt - BMX Drivetrain - AllYoogs

SPCE BMX front sprocket

82,95€

The SPCE BMX front sprocket, a performance advantage without sacrificing quality and design !

    • Centre distance : 104 mm – 4-bolt fixing for SPCE BMX chain
    • Size : 75 to 85 teeth – 5 mm
    • Weight : 97 g to 117 g depending on the number of teeth
    • Colour : gold
    • Material : Aluminium 7075
    • Surface treatment : Hard anodised

Choose your SPCE front sprocket

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Description

The special shape of the SPCE BMX front sprocket is the result of optimisation using Finite Element Method (FEM) simulation. This increases resistance and significantly reduces weight.

The AllYoogs® SPCE front sprockets are CNC machined in France from 7075-T6 aluminium (stronger than 6061 aluminium). This material guarantees lightness and above all a very high resistance of the product thanks to the hard anodising. This treatment gives our products a longer life.
 

The SPCE drivetrain kit is a definite advantage for riders. In fact, our SPCE drivetrain gives a minimum measured gain of between 2,4 and 2.8% in lap times.

We offer a wide range of gear ratios. We recommend you take a look at our development tables to choose the right front sprocket and improve your performance.

 
 
 
 
 
 
Special features :​

* Our SPCE Drivetrain kit fits all BMX frames except the following brands : Meybo HSX, GT, 4NIX, the Onyx Pro and the Meybo instant-engagement hubs.

💡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 SPCE drivetrain ?

1. 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 front sprocket and the rear sprockets.

For example: rear sprocket = 16 and front sprocket = 42. The value to be taken into account = 442.0

CLASSIC FRONT SPROCKET 4-bolt 104 mm – 20 x 1.3/8 TYRE
REAR SPROCKET404142434445
18374.2383.6392.9402.3411.6421,0
17396.2406.1416.0425.9435.8445,7
16421.0431.5442.0452,5463,1473,6
15449,0460,3471,5

To obtain the SPCE equivalence :

In the table, find the value that is closest to the one found in the table above (equal or greater value).

Example with 442.0 : we advise you to use a 30 rear sprocket with a 79 front sprocket.

AllYoogsSPCE FRONT SPROCKET 4-bolt 104mm – 20 x 1.3/8 TYRE
SPCE REAR SPROCKET757677787980
30421,0426,6432,2437,8443,4449,0

 
 
 
2. Development calculated in mm with a 20 x 1.6 tyre

In the table below, find the value indicated at the intersection of the front sprocket and the rear sprockets.

For example : – rear sprocket = 16 and front sprocket = 45. The value to be taken into account = 436.3
– rear sprocket = 17 and front sprocket = 49. The value take into account = 447,1

CLASSIC FRONT SPROCKET 4-bolt 104 mm – 20 x 1.6 TYRE
REAR SPROCKET40414243444546474849505152
18344,7353,3361,9370,6379,2387,8396,4405,0413,6422,3430,9439,5448,1
17365,0374,1383,2392,4401,5410,6419,7428,9438,0447,1456,2465,4474,5
16387,8397,5407,2416,9426,6436,3446,0455,7465,4475,0484,7494,4504,1
15413,6424,0434,3444,7455,0465,4475,7486,0496,4506,7517,1527,4537,7

To obtain the SPCE equivalence :

In the table, find the value that is closest to the one found in the table above (equal or greater value).

Example with 436,3 : we advise you to use a 28 rear sprocket with a 79 front sprocket.
447,1 :  we advise you to use a 28 rear sprocket with an 81 front sprocket.

AllYoogsSPCE FRONT SPROCKET 4-bolt 104 mm – 20 x 1.6 TYRE
SPCE REAR SPROCKET7576777879808182838485
30387,8393,0398,1403,3408,5413,6418,8424,0429,2434,3349,5
28415,5421,0426,6432,1437,7443,2448,7454,3459,8465,4470,9

3.  Summary calculated in mm with a 20 x 1.6 tyre inflated to 6 bars

Overall summary of the conversion table.

Reference calculation: (SPCE front sprocket ÷ SPCE cog) x 16 = standard front sprocket

Development = distance covered in cm by the rear wheel during one pedal turn

SUMMARY STANDARD/SPCE conversion table – 20 x 1.6 TYRE
Development387,8393,0398,1403,3408,5413,6415,5418,8421,0424,0426,6
Front sprocket40,0040,5341,0741,6042,1342,6742,8643,2043,4343,7344,00
Rear sprocket1616161616161616161616
SPCE Front sprocket7576777879807581768277
SPCE Rear sprocket3030303030302830283028
Development429,2432,1434,3437,7439,5443,2448,7454,3459,8465,4470,9
Front sprocket44,2744,5744,8045,1445,3345,7146,2946,8647,4348,0048,57
Rear sprocket1616161616161616161616
SPCE Front sprocket8378847985808182838485
SPCE Rear sprocket3028302830282828282828

4. Development calculated in mm with a 20 x 1.75 tyre

In the table below, find the value indicated at the intersection of the front sprocket and the rear sprockets.

For example : – rear sprocket = 16 and front sprocket = 44. The value to be taken into account = 437.2
                                – rear sprocket = 17 and front sprocket = 47. The value take into account = 439.5

CLASSIC FRONT SPROCKET 4-bolt 104 mm – 20 x 1.75 TYRE
REAR SPROCKET40414243444546474849505152
18353,3362,1370,9379,7388,6397,4406,2415,1423,9432,7441,6450,4459,2
17374,0383,4392,7402,1411,4420,8430,1439,5448,8458,2467,5476,9486,2
16397,4407,3417,3427,2437,2447,1457,0467,0476,9486,8496,8506,7516,6
15423,9434,5445,1455,7466,3476,9487,5498,1508,7519,3529,9540,5551,1

To obtain the SPCE equivalence  :

In the table, find the value that is closest to the one found in the table above (equal or greater value).

Example with 437.2 : we advise you to use a 28 rear sprocket with a 77 front sprocket.
                                439,5 :  we advise you to use a 30 rear sprocket with an 83 front sprocket.

AllYoogsSPCE FRONT SPROCKET 4-bolt 104 mm – 20 x 1.75 TYRE
SPCE REAR SPROCKET7576777879808182838485
30397,4402,7408,0413,3418,6423,9429,2434,5439,8445,1450,4
28425,8431,5437,2442,8448,5454,2459,9465,5471,2476,9482,6

 
 
 
 
5.  Summary in mm calculated with tyre 20 x 1.75 inflated to 6 bar

Overall summary of the conversion table.

Reference calculation: (SPCE sprocket ÷ SPCE cog) x 16 = standard front sprocket

Development = distance covered in cm by the rear wheel during one pedal turn
 

SUMMARY STANDARD/SPCE conversion table – 20 x 1.75 TYRE
Development397,4402,7408,0413,3418,6423,9425,8429,2431,5434,5437,2
Front sprocket40,0040,5341,0741,6042,1342,6742,8643,2043,4343,7344,00
Rear sprocket1616161616161616161616
SPCE Front sprocket7576777879807581768277
SPCE Rear sprocket3030303030302830283028
Development439,8442,8445,1448,5450,4454,2459,9465,5471,2476,9482,6
Front sprocket44,2744,5744,8045,1445,3345,7146,2946,8647,4348,0048,57
Rear sprocket1616161616161616161616
SPCE Front sprocket8378847985808182838485
SPCE Rear sprocket3028302830282828282828

 
 
 
 

Additional information

Weight 0,140 kg
Dimensions 31 × 31 × 1 cm
Size

76 teeth, 77 teeth, 78 teeth, 79 teeth, 83 teeth, 84 teeth, 85 teeth, 75 teeth, 80 teeth, 81 teeth, 82 teeth

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